Faulty Signal

ECM-220F REAR HEATED OXYGEN SENSOR (HO2S)
FAULTY SIGNAL

Checking for air leakage in the exhaust system
Check for air leakage according to Checking For Air Leakage In the Exhaust System

Remedy as necessary.

Was there any air leakage?
Yes - Skip to "Verifiaction"
No - Continue below.


Replacing Component
Try a new rear heated oxygen sensor (HO2S)
- To replace the heated oxygen sensor (HO2S), Heated Oxygen Sensor (HO2S), Replacing


Verification



Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reconnect connectors, reinstall components etc.
- Start the engine and let it idle.
- Read the signal from the rear Heated Oxygen Sensor (HO2S).
The value should increase and exceed 0.67 V within 5 minutes.

Is the value OK?
Yes - Testing Complete
No - Continue Below.


Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.