BMW P1138: HO2S Circuit Malfunction
Is your scanner showing BMW P1138?
No worries. We'll show you what it means and how to deal with it.
BMW P1138: HO2S Circuit Malfunction
OVERVIEWWhat Does The BMW P1138 Code Mean?
Engine running, battery voltage 11.5, all electrical components off, ground between engine and chassis well connected and the exhaust system must be properly sealed between catalytic converter and the cylinder head. The DME detected the HO2S signal failed.
What Are The Potential Causes Of The BMW P1138 Code?
- Leaks present in the exhaust manifold or exhaust pipes
- HO2S signal wire and ground wire crossed in connector
- HO2S element is fuel contaminated or has failed
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> Bosch 13477 Premium Original Equipment Oxygen Sensor
>>> Twippo 372Pcs Waterproof Wire Connectors Kit
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
BMW P1138, DTCDECODE.
