VOLVO
ECM-P20802F - Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 1. General Signal Failures. Signal erratic
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
8 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (8)
- Volvo S60 (2011–)2014–2015Engine D4204T5 only
- Volvo S80 (2007–)2014–2015Engine D4204T5 only
- Volvo V40 (2013–)2015Engine D4204T14 only
- Volvo V40 Cross Country (2013–)2015Engine D4204T14 only
- Volvo V60 (2011–)2014–2015Engine D4204T5 only
- Volvo V70 (2008–)2014–2015Engine D4204T5 only
- Volvo XC60 (2009–)2014–2015Engine D4204T5 only
- Volvo XC70 (2008–)2014–2015Engine D4204T5 only
What does this fault code mean?
The code concerns an erratic signal from the exhaust temperature sensor. The engine control module (ECM) checks that the signal follows a calculated value, and the code is set when the sensor gives an incorrect value.
Possible causes
- Loose connection or oxidation in the connections
- Damaged temperature sensor at the catalytic converter
- The mass air flow meter gives an incorrect reading, for example because of charge air leakage
What you can do
- 1If you have a diagnostic tool: start the engine and read the sensor value in live data, and see whether it jumps while the engine runs steadily
- 2Twist and wiggle the connector at the sensor and see whether the value changes
- 3Check that the connections are secure and free from oxidation
- 4Look for leaks in the charge air system, since a leak can give a wrong air mass reading
- 5If the fault remains, have a workshop check the sensor with diagnostic equipment
Symptoms you may notice1
- Check engine warning lamp lights or behaves abnormally
What the fault can affect1
- A calculated value is used instead of the sensor signal
General guidance for car owners. Diagnosis on the car can point to a different cause.