P0136 Fault Code
P0136 OBD-II Trouble Code Short Description
O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)
What does trouble code P0136 mean?
The P0136 fault code indicates a malfunction in the O2 sensor circuit for Bank 1 Sensor 2. This sensor plays a critical role in monitoring the exhaust gases and helps in adjusting the fuel mixture for optimal engine performance. When this circuit experiences issues, it can lead to poor fuel efficiency and increased emissions.
Symptoms
What are the symptoms of the P0136 code?
- Check Engine Light (CEL) illuminated
- Poor fuel economy
- Increased emissions
- Rough idling or engine performance issues
- Failing an emissions test
Causes
What causes the P0136 code?
- Faulty O2 sensor
- Wiring issue or short circuit in the O2 sensor circuit
- Corroded or damaged connectors
- Poor engine performance affecting the sensor's readings
- Software glitch in the Engine Control Module (ECM)
Possible Solutions
How to fix P0136?
- Inspect the O2 sensor and its wiring for damage or wear
- Replace the faulty O2 sensor if necessary
- Repair any damaged wiring or connectors
- Clear the fault codes and perform a test drive to ensure the issue is resolved
- In some cases, an ECM update may be required