VOLVO
ECM-141E - Temperature sensor, catalytic converter. Faulty signal
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (9)
- Volvo C30 (2007–2013)2007Engine D4204T only
- Volvo C30 (2007–2013)2008–2010Engine D4204T only · Transmission MMT6, MPS6 only
- Volvo C70 (2006–2013)2008Engine D4204T only
- Volvo C70 (2006–2013)2009–2010Engine D4204T only · Transmission MMT6, MPS6 only
- Volvo S40 (2004–2013)2005–2006Engine D4204T, D4204T2 only
- Volvo S40 (2004–2013)2007Engine D4204T only
- Volvo S40 (2004–2013)2008–2010Engine D4204T only · Transmission MMT6, MPS6 only
- Volvo V50 (2004–2013)2005–2007Engine D4204T only
- Volvo V50 (2004–2013)2008–2010Engine D4204T only · Transmission MMT6, MPS6 only
What does this fault code mean?
The engine control module (ECM) continuously compares the temperature from the front and rear catalytic converter temperature sensors. The fault is set if the difference between them becomes too large, or if the front sensor signal rises too quickly after start.
Possible causes
- Play, contact resistance or oxidation in the connections to either temperature sensor
- Open circuit or short in the wiring to either temperature sensor
- Damaged temperature sensor
What you can do
- 1Read the fault code, clear it and test drive to see whether it returns
- 2Check the connectors of the front and rear temperature sensors for play, contact resistance and oxidation
- 3Check the wiring to the temperature sensors for breaks and shorts
- 4If you have a diagnostic tool: compare the temperatures from the two sensors in live data with the engine running; the difference should be small after a short drive
- 5If the wiring is fault-free: have a workshop check the temperature sensors
Symptoms you may notice1
- A text message appears in the display
General guidance for car owners. Diagnosis on the car can point to a different cause.