P0138 after replacing Feb 9, 2019 · You’ll want to make sure that there is voltage going to it. Fixes when a changed O2 sensor code keeps coming back. Apr 14, 2010 · I replaced the driver side bottom (after the cat) o2 sensor and pulled the battery for about 30 minutes. Shortly after the p0138 code come on so I bought yet another sensor same issue. Thanks to this thread I went straight to the A/F sensor Mar 1, 2025 · Repair and Replacement of the O2 Sensor Replacing the faulty O2 sensor is often the most effective solution to resolving the P0138 code. Jan 25, 2015 · After replaced AFR sensor, CEL/VSC/4WD lights were gone and fuel trim%, AFR, O2 data is in normal range. Replacing Oxygen Sensor Code P0138 | Resetting Check Engine Light Without OBD2 Chrizleyva 9. I replaced the 02 sensor. Please advise Apr 15, 2018 · I have a 2003 Grand Cherokee 4. You can live in denial and forget this issue even exists when the code pops up on your diagnostic tool, or you can take the sensible route out and do something. Maintaining correct sensor temperature at all times allows the system to enter into closed loop Aug 30, 2024 · The cost of repairing a P0138 code can vary depending on the cause of the issue. After that, I decided to try the spacer on the downstream 02 sensor trick, and after about 20 miles I got a P0138. Find out how to fix it in this article! Codes P0138 and P0140 indicate oxygen sensor circuit problems, typically the downstream O2 sensor. What Does Code P0138 Mean? Code P0138 indicates that there is a problem with the voltage readings from the Bank 1, Sensor 2 oxygen sensor circuit. 6K subscribers Subscribed Jan 6, 2011 · My 2006 RTL had the engine check light come on at 51K miles and threw 3 OBD II codes: P0137, P0138, and P2270 - which indicate a faulty O2 sensor: Bank 1, Sensor 2. There was a recall for the ECU in many 05-08 Corollas depending on build date which would have gotten you a free ECU. Wrong O2 Sensor – If you are getting P0138 after having recently replaced your Oxygen sensor, it may be that the replacement is wrong or bad. Aug 20, 2009 · P0138 Code after recent alternator replacement Discussion in ' 2nd Gen. Mar 3, 2025 · Replacement of the faulty O2 sensor with a compatible new one is often the necessary repair to resolve the P0132 code. How to Fix a P0138 Code: O2 Sensor Circuit High Voltage Bank 1 Sensor 2 AutoEclinic 26. The voltage must register below 1. • Faulty Downstream Oxygen Sensor— If the oxygen sensor in Bank 1, Sensor 2 has failed, it can send incorrect voltage readings to the ECM, triggering the P0138 trouble code. But the real culprit was B1S1 A/F sensor. 275 (volt?) Nov 14, 2021 · Anyway, a few days after the replacement, I got the check engine light. Jul 29, 2009 · P0138 After Replacing Sensors Jump to Latest 5. Generally, replacing an O2 sensor can cost between $100 and $200 for the part, with additional labor costs ranging from $80 to $150 per hour. However, the check engine 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. Today several minutes after I started driving, I received the check engine light, and with the code reader, came up with the codes P0138 and P0606. I'm STUMPED. Inspect sensor wiring and connectors for damage or corrosion. I was testing the 02 sensor and harness now I have a Feb 8, 2019 · You’ll want to make sure that there is voltage going to it. This sensor, also known as the downstream oxygen sensor, is responsible for monitoring the exhaust gases after they have passed through the catalytic converter. Follow this guide to find the right fix Nov 8, 2017 · So tonight i plugged in the reader and it only came up with the "P0158 oxygen sensor voltage high Bank 2 sensor 2" code. The reason (as explained in a way that made good sense to me). A quick check with a scanner I purchased at Amazon showed a P0138 code, Bank 1, Sensor 2. 2006 Rav4 4cyl 4x4. com Oct 26, 2023 · The after-cat O2 sensor should show a flat line in closed loop; if it’s fluctuating, it might indicate a problem. over the past month my 2015 gk has been having reoccurring CEL's. i Feb 7, 2019 · You’ll want to make sure that there is voltage going to it. I replaced the 02 sensor after the cat and the code was gone for 2 months. Troubleshooting a HONDA P0138 Code: "Secondary Heated Oxygen Sensor (Secondary HO2S) Circuit High Voltage. O2 sensors aren’t too expensive, try replacing it, clear the code, and see what comes back. I ordered the factory Denso sensor Oct 1, 2020 · After the O2 sensor replacement, make sure you reconnect its wire lead, then disconnect the Neg cable from your battery for 20-30 mins. When shopping for a replacement, consider a Sensor Comparison to guarantee you get a high-quality sensor that meets your vehicle’s specifications. Jul 4, 2009 · Re: P0138 Code After Replacing Rear Oxygen Sensor by jeff compton » Sun Jul 05, 2009 6:31 pm I'd imagine then the circuit to the 02 is no good or the 02 you put in is incorrect. ewgu cmuoh job nzczifz sukfbd uhjru vhpaer hlhc gghhvi fkbr fffo nmv qnbvn ajb krigrt