VOLVO
ECM-P160947 - Diagnostic Lamp Driver. System Internal Failures. Watchdog / safety µC failure
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (8)
- Volvo S80 (2007–)2007–2009Engine D5244T4, D5244T5 only
- Volvo S80 (2007–)2010–2011Engine D4164T only
- Volvo V70 (2008–)2008–2009Engine D5244T4, D5244T5 only
- Volvo V70 (2008–)2010–2011Engine D4164T only
- Volvo XC60 (2009–)2009All engines except: B6304T2
- Volvo XC70 (2008–)2008All engines except: B6324S
- Volvo XC70 (2008–)2009Engine D5244T4, D5244T5 only
- Volvo XC90 (2003–)2013–2014Engine D5244T18, D5244T5 only
What does this fault code mean?
The engine control module (ECM) has registered an internal reset. The code concerns the control module's own supervision of the microprocessor, and the condition is the internal reset itself. The fault may be caused by faulty software or by an internal fault in the engine control module.
Possible causes
- Faulty software in the engine control module (ECM)
- A fault inside the engine control module (ECM) itself
What you can do
- 1Read off the fault codes and note which are present before clearing any
- 2Clear the fault code, switch the ignition on and wait a while so the control module can run its test
- 3Check that the fault code is no longer active when the test has finished
- 4If the fault code returns: have a workshop check that the engine control module has the latest software and replace the control module if the fault remains
Symptoms you may notice1
- No noticeable symptoms for the driver
General guidance for car owners. Diagnosis on the car can point to a different cause.