Intermittent p0138. Code P0131 indicates issues with an oxygen sensor.

Intermittent p0138 This heated oxygen sensor is found at the back of the catalytic converter. Read on to learn what exactly causes it, how driveability is affected, and how to fix it (the right way). Definition O2 Sensor Circuit High Voltage (Bank 1, Sensor 2) Meaning Your vehicle Engine Control Module (ECM) stores a P0138 when it detects the O2 sensor for Bank 1, Sensor 2 fails a voltage test. It runs well but the CEL has been on again off again since I bought it. So for the last week I’ve been getting an intermittent P0138 o2 code which I would just manually clear with my OBD scanner… May 3, 2009 · My check engine light has been on with a P0138 High voltage code, bank 1 sensor 2. Jul 30, 2024 · The P0138 diagnostic trouble code denotes an issue with the downstream oxygen (O2) sensor in a vehicle's exhaust system. The dealer suggested incorrect catalytic converter placement, but another possibility is that the aftermarket catalytic converters aren't functioning within the OEM time parameters Aug 20, 2018 · The purpose to this post is to provide Jeep owners with a means to run DTC without the need for a scan tool. 0 volts and 1. This is one of the most frequent OBD2 trouble codes. Jul 1, 2010 · Jeep Enthusiast Forums provides answers from our community and over 22 other related forums. Here’s a pretty helpful video Code P0138. The Apr 5, 2023 · My 05, EXL (~203,000 miles) threw a P0138 (O2 Circuit High Voltage) (Bank 1, Sensor 2). It is throwing P0138 which is a sensor high voltage on the downstream right side. The Powertrain Control Module (PCM) detects that the voltage coming from the sensor is higher than what the manufacturer specs illustrate. In some cases, the code sets because the oxygen sensor isn’t responding quickly enough to adjust for the air-fuel mixture in the combustion chamber We would like to show you a description here but the site won’t allow us. Maintaining correct sensor temperature at all times allows the system to enter into closed loop Sep 16, 2024 · The P0139 code for Jeep vehicles indicates a slow response from the oxygen sensor 1/2, which is located in the exhaust system. 8l? Sent from my iPhone using Tapatalk Oct 10, 2023 · Oxygen sensors are key for performance and emissions, but can (and will) fail over time. The downstream Sensor-2 works May 15, 2023 · Hi everyone, today I got these codes (P0138 and P0158) on my ‘04 Maxima. Here’s a pretty helpful video Dec 16, 2024 · What does the P0137 Oxygen Sensor Circuit Low Voltage (Bank 1, Sensor 2) mean? P0137 code gets triggered when the Engine Control Module detects that the voltage from the oxygen sensor —also known as the air-fuel ratio sensor —has remained below 400 milli volts for more than 20 seconds, causing the engine to run either too rich or too lean. Jul 26, 2021 · Recent work was replacing the spark plugs with Denso Iridium SK20R11 and the secondary O2 sensor (Bank 1 Sensor 2) for intermittent P0138 and P0606 codes. Randomly, the ABS, 4WD, VSC, and BRAKE lights would come on while driving. Had this one pop up as I parked the jeep after a normal drive, Cleared it, and it eventually came back Mar 8, 2019 · P0139 is a common OBDII code that occurs in many vehicles, including the Jeep Wrangler. The code is triggered when there is an issue with the response time from the oxygen (O2) sensor when switching voltage levels. Replacing the rear O2 sensor is typically the first course of action, but other repairs may be necessary if the code continues to be set. The O2 sensor is responsible for monitoring the amount of oxygen in the exhaust gases and sending this information to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. I've replaced the sensor to no avail. Also includes links to relevant forum topics on the code. In most cases, it's the sign of a bad downstream oxygen sensor. So I cleaned the MAF with MAF Feb 8, 2019 · P0138 is a common OBDII code that occurs in many vehicles, including the Nissan Rogue. Jun 20, 2022 · The best thing to do is go through all the steps below, which will help you fix the P0138 obd2 code. Sep 20, 2016 · We recommend Torque Pro Table of Contents What Does Code P0139 Mean? What are the common causes of code P0139 ? What are the symptoms of code P0139 ? How do you troubleshoot code P0139 ? Codes Related to P0139 Get Help with P0139 What Does Code P0139 Mean? OBD II fault code P0139 is defined as “Oxygen Sensor Slow Reponse (Bank I Sensor 2)”, and is set when the PCM (Powertrain Control What Does P0138 Code Mean? Code P0138 is triggered when the powertrain computer or PCM determines that the rear oxygen sensor voltage remained above 450 millivolts for more than twenty seconds (varies with vehicle make and model) or that the air fuel ratio sensor remained in a rich-biased mode for too long (varies with vehicle make and model). The CEL came back on a few days later and said it was the mass air flow sensor and the same O2 sensors as well. 1999 Infiniti I30 Intermittent Idle Miss and P0138 Code Fix I30 owners often face O2 sensor faults and intermittent engine misfires at idle conditions. ), or to establish a professional-client relationship. The following are several of the most common symptoms related to DTC P0137. About 85000 miles. Code P0131 indicates issues with an oxygen sensor. A faulty bank 1 O2 sensor 2 and leaks in the exhaust system are some common causes of the P0139 code. The oxygen sensor plays a crucial role in monitoring the amount of oxygen in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. P0138 Nissan Rogue 2018Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. 0-volt bias voltage to the B1S2 sensor circuit. The Oxygen sensors are responsible for helping the ECM meter oxygen levels in the exhaust, and helping to Discover how to diagnose and fix the P0138 code in your car. I have replaced all of the sensors with new bosch ones. Get codes C1201 and P0138. Oct 10, 2020 · Getting intermittent check engine light with p0138 code. I bought this 2004 TJ last Sept then stored it for winter. Got to the tyre place (my destination) stopped, Jul 26, 2017 · P0132,P0138,P0152,P0158 - the 4-Wire Oxygen sensor is equipped with a galvanic battery that typically generates a voltage signal between 0. I replace the 02 sensor near the manifold (before the cat) as told to with a Bosch, but the light is still one, even after i reset the code it came back on. Does anyone know where the sensor is located on a 3. I recently found that the Mar 19, 2017 · I replaced my PCM. So I replaced them with OEM Denso sensors. Is it just a garbage bosch o2 sensor and should I just replace it with Dec 9, 2022 · Slow response O2 sensor codes are suddenly appearing. Specifically, this code signifies the engine control module (ECM) has detected that the voltage or resistance of the posterior O2 sensor is beyond the customary operating range. I have a new O2 sensor, just haven't installed it yet. Learn how to diagnose as well as repair this DTC. There was a Technical Service Bulletin for my VIN corolla to refresh the ECM (PCM) as a possible cure for the P0138 code (O2 sensor. Feb 8, 2019 · P0138 is a common OBDII code that occurs in many vehicles, including the Dodge Journey. When it is on, I am getting p0138 and p0158 codes. Also, while I'm driving, sometimes when I hit a bump the power to the engine will cut out shortly and the instrument cluster will reset. It should create an output signal that’s Feb 7, 2019 · P0138 is a common OBDII code that occurs in many vehicles, including the Jeep Wrangler. Nov 3, 2023 · Modern vehicle computers rely on sensor feedback to maximize efficiency. your choices are replace the o2s s1 bank 2, again or the ecm, well my cousin is a mechanic The P0138 code indicates high voltage in the O2 sensor circuit. Let’s go over the common causes of a P0139 code, how serious it really is, and show you the diagnostic steps to take to confirm sensor failure. However, I believe this noise isn't connected to that sensor issue. Feb 15, 2024 · Trouble Code: P0138 Oxygen Sensor Circuit High Voltage Threaded into your vehicle’s exhaust pipes or exhaust manifold is a heated oxygen sensor (HO2S), which monitors your exhaust to see if the engine is running on too much fuel and not enough air or vice versa. a week later the same codes came back. Comes and goes. Mar 1, 2025 · The P0138 code specifically indicates a high voltage condition in the O2 sensor circuit for bank 1 sensor 2, which can wreak havoc on your fuel efficiency and emissions. I have an intermittant code P0138 (ox sensor high voltage) on my 97 XJR (6 cly). May 31, 2024 · The P0139 code stands for “O2 Sensor Circuit Slow Response (Bank 1, Sensor 2)”, which means there’s an issue with the signal from the rear oxygen (O2) sensor on bank 1. I need advice since I have had issues with my Jul 30, 2008 · Ok, here is the long story short: I drive a 1998 Jeep Wrangler Sport 6 cyl, and last year I got caught in a horrendous rain storm. Dec 19, 2024 · What does the P0138 Oxygen Sensor Circuit High Voltage (Bank 1, Sensor 2) mean? P0138 code gets triggered when the Engine Control Module detects that the voltage from the oxygen sensor —also known as the air-fuel ratio sensor —has remained too high for too long. Fuel mileage seems poor (although with my lack of Jeep experience I don’t know what The P0138 code for Jeep vehicles indicates that there is a problem with the O2 (oxygen) sensor 1/2 circuit being too high. 2 volts) for more than 10 seconds. I have a 2012 Suzuki Frontier (rebadged frontier). Jan 4, 2008 · P0138 testing procedure Discussion in ' Gen 2 Prius Care, Maintenance and Troubleshooting ' started by Kamaloha, May 3, 2021. Jun 6, 2008 · The original post details the replacement of O2 sensors on a 2000 Jeep Wrangler 4. DTC Troubleshooting: P0138 NOTE: Before you troubleshoot, review the general troubleshooting information. Can you tell me the best way forward on this problem IE changing the Map Sensor help with the O2 lamdba sensor ? At the moment im running a tank with addictive and have cleaned Map The club for Nissan Maxima and Infiniti I30 / I35 owners, and the official home of Maxima Club of America! Nov 10, 2024 · If you're getting persistent P0139 and P0159 codes (slow O2 sensor response) after replacing your exhaust system on a 2011 Jeep Wrangler JKU, especially with an aftermarket system, several factors could be at play. I am a bot, and this action was performed automatically. I'm wondering if this is a known issue on the four cylinder 2. In this situation, do people go ahead and replace the sensor or wait until the code returns again? Do these sensors sometimes set Oct 31, 2023 · When your check engine light comes on, it can mean anything from a loose sensor connection to a catastrophic engine issue, and everything in between. Learn its causes, symptoms, and fixes to keep your vehicle running smoothly. I had 2 sensors replaced back in January. Code P0139 indicates an issue with one of your vehicle’s O2 sensors. 6K subscribers Subscribed Jun 1, 2021 · P0137, P0138, P0139 I'm new to the forums and this is my first post. This code occurs when the powertrain control module (PCM) detects that the oxygen sensor’s voltage reading is too high. Bank 1 is the side of the engine that contains the #1 cylinder. Keep reading to learn what exactly causes a P0131 code, how serious it is, and how to properly diagnose and fix the issue so you can get back to driving and not have to What Does P0138 Code Mean? Code P0138 is triggered when the powertrain computer or PCM determines that the rear oxygen sensor voltage remained above 450 millivolts for more than twenty seconds (varies with vehicle make and model) or that the air fuel ratio sensor remained in a rich-biased mode for too long (varies with vehicle make and model). Dec 30, 2017 · My CEL keeps coming on and going off. I took it to an auto parts store and they told me it had to do with the O2 sensors. I'm assuming I have a short somewhere. Please contact the moderators of this subreddit if you have any questions or concerns. Other possible causes include a failed catalytic converter, a vacuum leak, or a misfiring engine. The P0137 code triggers when the voltage of oxygen sensor 2 is too low. Volvo S40 2. DTC P0138, sometimes indicated as P013800, is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (Fuel and Air Metering). Learn about the causes, symptoms and procedures to ensure your vehicle runs smoothly. 0 volts. Of course, you’ll typically have the check engine light, but other common symptoms include a rough idle or decreased fuel efficiency. Sep 9, 2024 · The P0138 GMC code refers to a problem with the HO2S (heated oxygen sensor) Circuit High Voltage for Bank 1 Sensor 2. This procedure is fairly straight forward and, to my knowledge, will work with all Chrysler products dating back as far as the 1980 Detailed information on troubleshooting and repairing a P0158 DTC code which refers to a high voltage in the number 2 O2 sensor circuit on bank 2. This high voltage indicates that the oxygen level in the exhaust gas is abnormally low. 5tdci, I have an intermittently occurring p0138, it's only triggered once so far in me owning the car, and that was today after driving through a flooded road (water level up to just above the bottom of my number) I drove through dead slow. However, this morning the check engine light turned off on its own. Although this procedure is not as useful or effective as a scan tool, it may help reduce some stress when you find your MIL illuminated while off the grid. Sep 15, 2025 · Learn all about the P0138 code, what causes O2 sensor circuit high voltage, and how to diagnose and fix common issues to maintain optimal engine performance. it went on in cold weather both times (around 20-degrees F). 4L 4cyl 4WD Base, bought used little less than a year ago and it so far has been good to us minus this one seemingly random issue. These codes do not point out to a specific issue but they can help hint at the root cause of the issue. It has the 2. This code refers to a potentially life-threatening air system fuel pressure problem. Aug 30, 2024 · The P0138 diagnostic trouble code indicates that the O2 sensor circuit for bank 1 sensor 2 is registering a high voltage condition. Oct 26, 2013 · My check engine light came on and the codes said it was the 2 downstream 02 sensors: codes P0157 and P0138. Jul 7, 2017 · I received these codes out of the blue, luckily after my corolla came back from the auto body shop, They said it was the downstream o2s and changed it for free. I consulted with **** yesterday, who explained the situation, but I still feel concerned about the noise. Definition of P0138 obd2 code The P0138 obd2 code usually appears on the Catalyst Control Module (bank 1). 0L due to OBDII codes P0132 and P0138 (High Voltage Output in sensors 1 & 2). This sensor is responsible for monitoring the oxygen levels in the exhaust gases and sending this data to the engine control module (ECM) for proper fuel delivery and emission control. That’s why it’s so important to scan for any stored trouble codes. Any idea? The P0138 is triggered when the downstream O2 sensor (bank 1) voltage is too high (>1. My mechanic cannot figure out the cause. Some common symptoms related to the P0139 code include an illuminated check engine light and a failed emissions test. This sensor is responsible for monitoring the oxygen levels in the exhaust gases as they leave the engine. I clear the code and it comes back eventually. 5 volts for over 3 seconds. Here's exactly what you need to do to fix it. . 1999 Infiniti I30 intermittant miss at idle only, repeat code P0138 after O2 sensor replacement, 106k miles What Does P0138 Code Mean? Code P0138 is triggered when the powertrain computer or PCM determines that the rear oxygen sensor voltage remained above 450 millivolts for more than twenty seconds (varies with vehicle make and model) or that the air fuel ratio sensor remained in a rich-biased mode for too long (varies with vehicle make and model). Here’s a freeze frame of the reader. 10 votes, 24 comments. Intermittently getting a P0138 code. Nov 28, 2005 · 2014 PiP - 213K KM - P0607 & P0138 intermittent Discussion in ' Gen 3 Prius Care, Maintenance & Troubleshooting ' started by Sarge, May 3, 2023. Ho2S 2 signal is less active than signal produced by front oxygen sensor. Ever since that my Check Engine Light has been going off and on. I cleared it and havent been on the freeway again until today Darn code came back! P0139 - O2 Sensor 1/2 Slow Response. I checked my ground to the engine block which is good Top 4 Reasons Why You Replaced O2 Sensor and Still Have Code The most common codes that people will see in this particular situation are P0134, 0138, and 0139, though you are probably seeing P0420. Banks are also known as cylinders. I checked ground lines for all the sensors and they are good. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc. Specifically, we’re talking about the oxygen Sep 14, 2005 · Sounds familiar to what I am going through with my Acura right now. This code sets when HO2 Sensor voltage is greater than 999 mV for more than Mar 10, 2025 · The iCarsoft CR MAX & CR Eagle is a best oxygen sensor fault code reader and engine performance tool that can diagnose the Mercedes-Benz P0138 O2 sensor circuit high voltage (Bank 1 Sensor 2). Feb 7, 2019 · P0138 is a common OBDII code that occurs in many vehicles, including the Chevy Equinox. Sep 20, 2016 · We recommend Torque Pro Table of Contents What Does Code P0136 Mean? What are the common causes of code P0136 ? What are the symptoms of code P0136 ? How do you troubleshoot code P0136 ? Codes Related to P0136 Get Help with P0136 What Does Code P0136 Mean? OBD II fault code P0136 is defined as “Oxygen Sensor Circuit Malfunction (Bank I Sensor 2)”, and is set when the PCM (Powertrain What Does P0138 Code Mean? Code P0138 is triggered when the powertrain computer or PCM determines that the rear oxygen sensor voltage remained above 450 millivolts for more than twenty seconds (varies with vehicle make and model) or that the air fuel ratio sensor remained in a rich-biased mode for too long (varies with vehicle make and model). Dec 6, 2008 · Additional Info: TRUWT28N341001713 AUZ5Z0C3235032 3 Faults Found: 16523 - Oxygen (Lambda) Sensor B1 S2: Response too Slow P0139 - 35-10 - - - Intermittent 16522 - Oxygen (Lambda) Sensor B1 S2: Signal too High P0138 - 35-10 - - - Intermittent 17522 - Oxygen (Lambda) Sensor; B1 S2: Internal Resistance too High P1114 - 35-00 - - Readiness: 0000 0000 Aug 28, 2019 · So this code popped up a few days ago while on the freeway. 5 and if so Jan 7, 2023 · Get an in-depth explanation of what the P0136 code means, the causes and symptoms associated with it, and how to go about fixing it. 0 t 2002 Petrol P0107 P0138 P0139 I have engine light coming intermittent may be on for half day then off for 2 days ,Codes are PO107/Po138 and Po139. Any suggestions How to fix a P0138 engine Code: O2 Sensor Circuit High Voltage Bank-1 Sensor-2 The computer (ECM/PCM) uses the upstream O2 Sensor-1 to modify the air/fuel mixture. Jan 14, 2013 · INTERMITTENT ENGINE TROUBLE P0138 Discussion in ' Gen 2 Prius Care, Maintenance and Troubleshooting ' started by colmenedo, Jan 15, 2013. We’ll go over those below. Periodically all my dashboard controls stop working and I have to tap the glass to get my MPH Nissan Rogue 2018 issueThank you for reaching out. Jan 26, 2025 · P0138 code indicates a high voltage reading from the oxygen sensor circuit, specifically for Bank 1 Sensor 2. It returned a couple of days ago. We would like to show you a description here but the site won’t allow us. When the oxygen sensor responds slowly or inaccurately, it May 28, 2024 · The P0138 trouble code technically means "Oxygen Sensor Circuit High Voltage (Bank 1, Sensor 2)". What Does P0138 Code Mean? Code P0138 is triggered when the powertrain computer or PCM determines that the rear oxygen sensor voltage remained above 450 millivolts for more than twenty seconds (varies with vehicle make and model) or that the air fuel ratio sensor remained in a rich-biased mode for too long (varies with vehicle make and model). What could cause the intermittent C1201 code? Nov 3, 2023 · Related: Code P0134, Code P0135, Code P0136, Code P0138, Code P0139, Code P0140, Code P0151, Code P0157, Code P0160 Symptoms of Code P0137 A number of symptoms can be associated with diagnostic trouble code P0137, though these symptoms often vary on a case-by-case basis. Nissan rogue 2018 I got a code P0138 , one place told me it is a Exhaust gas leaks, another place told me Oxygen Sensor needed to be replaced What’s common issue with that make/model and that engine code ? Aug 18, 2024 · The P0138 code for Toyota vehicles indicates an issue with the Oxygen Sensor Circuit High Voltage for Bank 1 Sensor 2. If you are asking a question please make sure to include any relevant info along with the following: Redditors that have been verified will have a green background and an icon in their flair. The voltage must register below 1. Here’s a pretty helpful video How to Fix a P0138 Code: O2 Sensor Circuit High Voltage Bank 1 Sensor 2 AutoEclinic 26. This sensor is located downstream of the catalytic converter and is responsible for monitoring the oxygen content in the exhaust gases. Here’s a pretty helpful video What Does The P0138 Code Mean? The Heated Oxygen Sensor (2) located rear of catalytic converter produces an output signal relative to oxygen storage capacity of catalytic converter. The 4-Wires O2 sensor also includes a heating element that keeps the sensor at proper operating temperature during all operating modes. I keep getting P0317, p0318, p0319 codes. This sensor is responsible for monitoring the oxygen levels in the exhaust gases after they have passed through the catalytic converter. Jan 2, 2024 · On my 1. The P0138 code indicates a high voltage reading from the upstream O2 sensor circuit, often caused by wiring issues or a faulty sensor. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself There are also some less likely problems that can cause P0138. But what’s causing this issue, and how can you fix it? Oct 26, 2023 · The code P0138: Oxygen Sensor Circuit High Voltage (Bank 1, Sensor 2) points out a fault in the downstream oxygen sensor for Bank 1, and most likely is caused Feb 9, 2024 · Learn what a P0138 code means and the most likely cause and fix. I replaced the O2 sensors last winter and got a new Wranglerfix ECM to get rid of the previous O2 Sensor Heater Circuit Malfunction codes. Here are a couple of the parts to take a look at so that you can perform the diagnosis May 1, 2024 · Or the wiring to the sensor can break and cause an intermittent connection, or the sensor can malfunction. 5 cyl four cylinder, manual transmission, and is two wheel drive. Code P0138 indicates an issue with a specific O2 sensor. No more codes. The most common cause of the P0138 code is a defective oxygen sensor. Jan 7, 2023 · What Does the P0138 Code Mean? The P0138 DTC is a generic trouble code that says the oxygen sensor circuit (Bank 1, Sensor 2) is exhibiting higher voltage than normal. If the code is caused by a defective oxygen sensor, the most common Jan 26, 2025 · Common codes associated with a P0139 include P0138, which signifies a high voltage from the O2 sensor; and P0141, indicating an issue with the heater circuit for Bank 1 Sensor 2. Nov 2, 2023 · See Also: P0130, P0131, P0133, P0134, P0135, P0137, P0138, P0160 Symptoms of Code P0132 While some oxygen sensor codes don’t present many symptoms, that’s usually not the case with a code P0132. Find diagnostic trouble code charts for Toyota Tacoma pickup truck repairs and maintenance. When your vehicle’s ECU detects that the voltage output from this sensor is exceeding manufacturer specifications, it triggers this code. The downstream The P0138 code for Chevrolet vehicles indicates an issue with the HO2S (Heated Oxygen Sensor) Circuit High Voltage Bank 1 Sensor 2. Feb 12, 2023 · What Does the P0132 Code Mean? The P0132 code indicates that there is a high voltage issue on your Oxygen sensor or Bank 1. I have been getting intermittent P0138/P0139 codes for the secondary O2 sensor circuit. But sensors eventually fail, logging diagnostic trouble codes and illuminating check engine lights. Dec 30, 2018 · The vac and trac light and check engine light came on a few months ago, then went off. May 23, 2025 · The P0138 DTC is a generic trouble code that says the oxygen sensor circuit (Bank 1, Sensor 2) is exhibiting higher voltage than normal. Read the full article below to know what it means, how to fix it, and what other codes may show related to it. I am not sure why I would be getting these codes. I decided to drive to an expert shop to get Intermittent Light Show with P0138 & P0606 We own a 2007 Rav4 2. The PCM supplies a 5. Key points include: * Non-California emissions Jeeps have two O2 sensors (upstream and downstream), while California emissions Jeeps have four. I've been hearing a strange noise since yesterday, and I received a code P0138, which relates to the oxygen sensor on bank one. * For non-Cali Jeeps, use Bosch part number 13122 for the upstream sensor. Mar 4, 2021 · I once had a 1998 Jeep Cherokee Sport produce an intermittent P0138 code, indicating that the B1S2 return signal remained over 1. toozup sqdhhum clo feue dmboo clug ukaz jlednlcb olycqo ixp ydrfq muszdl otwnln tzyv sbjmyt