May 3, 2009 · My check engine light has been on with a P0138 High voltage code, bank 1 sensor 2. I replace the 02 sensor near the manifold (before the cat) as told to...

May 31, 2025 · The P0138 code is set when the Engine Control Module (ECM) detects that the rear O2 sensor signal voltage remains excessively high for an extended period of time. Inspect …

Jul 30, 2008 · It threw a P0138 code: the input voltage from 02 sensor 2 in bank 1 is too high. I went to Autozone and got a new O2 sensor. Got in the car, and no more check engine light. …

Apr 10, 2010 · I cleared the code and after about an hour, the CEL came back on. Before the light came back on, the engine was running perfect. But now it's running a bit rough at idle again, …

Jan 22, 2009 · P0138 is the high-voltage code for the downstream O2 sensor. If the sensor does not generate a variable voltage output after a fixed amount of time, the PCM substitutes a …

Oct 1, 2017 · My TJ show today check engine light and P0138 code so it looks like new o2 sensor is needed I had quick look under Jeep and there is 2 sensors; 1 at front and 1 and rear …

Apr 20, 2009 · 99 XJ Sport. Replaced both O2 sensors over last year, am getting p0138 bank 1 sensor 2 code and p0141.e Just changed aft sensor and it came back. Checked harness, …

Jan 7, 2024 · Update on this issue, because P0138 code pertains to O2 sensor on the first 3 cylinders and I had just replaced the spark plugs and coil pack, I decided to review my install …

May 3, 2013 · P0138-1/2 O2 SENSOR SHORTED TO VOLTAGE When Monitored: With battery voltage greater than 10.4 volts, engine running for more than 4 minutes and coolant …

Jan 25, 2011 · Got the engine code which was P0138 and subsequently changed the bank 1, sensor 2 Oxygen sensor. After installation, I reset the engine light so that it would stay off. I …