VOLVO
ECM-0097 - Intake air temperature (IAT) sensor. Signal too low
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 (10)
- 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)2004–2006Engine 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)2004–2006Engine D4204T, D4204T2 only
- Volvo V50 (2004–2013)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 keeps watch on the intake air temperature sensor and has registered a reading that is too low. The cause is most often poor contact, or a break or short to ground in the wire, but the sensor itself may also be damaged.
Possible causes
- Looseness, contact resistance or oxidation in the connections
- Break in the signal wire
- Signal wire shorted to ground
- Damaged intake air temperature sensor
What you can do
- 1With the ignition off, check the connector to the intake air temperature sensor for play, contact resistance and oxidation
- 2Use a multimeter to check that the sensor's signal wire has no contact with ground (the body) and does not break when the wiring is moved
- 3If the fault returns after erasing codes and a test drive although the connectors and wiring are sound, have a workshop replace the intake air temperature sensor
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.