BMW DTC P0136 – O2 Sensor Circuit (Bank 1 Sensor 2)
DTC P0136 meaning on BMW
DTC P0136 on a BMW indicates a fault with the O2 sensor circuit for Bank 1 Sensor 2. This code specifically points to a malfunction in the downstream oxygen sensor located after the catalytic converter on the bank 1 side of the engine.
BMW DTC P0136 symptoms
Symptoms of DTC P0136 on a BMW may include poor fuel economy, rough idling, engine hesitation, stalling, or an illuminated Check Engine Light on the dashboard.
BMW DTC P0136 causes
The common causes of DTC P0136 on a BMW include a faulty downstream oxygen sensor, damaged wiring or connectors in the sensor circuit, exhaust leaks near the sensor, or issues with the engine’s air-fuel mixture.
BMW DTC P0136 seriousness
While DTC P0136 may not cause immediate drivability issues, it can lead to decreased fuel efficiency and increased emissions. Ignoring this fault can potentially cause damage to the catalytic converter over time.
How to diagnose DTC P0136 on BMW
To diagnose DTC P0136 on a BMW, start by using an OBD-II scanner to retrieve the fault code. Then, visually inspect the downstream oxygen sensor and its wiring for any visible damage. Perform a voltage check on the sensor to ensure it is functioning within specifications.
How to fix DTC P0136 on BMW
To fix DTC P0136 on a BMW, replace the downstream oxygen sensor if it is found to be faulty. Check and repair any damaged wiring or connectors in the sensor circuit. Clear the fault code and test drive the vehicle to ensure the issue has been resolved.
How to erase DTC P0136 on BMW
To erase DTC P0136 on a BMW, use an OBD-II scanner to clear the fault code from the vehicle’s computer. Ensure that the underlying issue causing the fault code has been addressed before clearing it to prevent the Check Engine Light from reappearing.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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