VOLVO
ECM-170F - Atmospheric pressure sensor/boost pressure sensor range check. Faulty signal. Intermittent fault
System
Engine Control Module (ECM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
5 modelsC70 Cabriolet (1998–2005), C70 Coupé (1998–2002), S70 (1997–2000), V70 (1997–2000), V70 XC (1998–2000)
Show models by year and engine (10)
- Volvo C70 Cabriolet (1998–2005)1999, 2001–2002
- Volvo C70 Cabriolet (1998–2005)2000All engines except: B5244S
- Volvo C70 Coupé (1998–2002)1999All engines except: B5254S DENSO
- Volvo C70 Coupé (1998–2002)2000All engines except: B5244S
- Volvo C70 Coupé (1998–2002)2001–2002
- Volvo S70 (1997–2000)1999Engine B5204T3, B5204T4, B5234T3, B5234T7, B5254T only
- Volvo S70 (1997–2000)2000Engine B5204T3, B5204T4, B5234T3, B5234T7, B5244T only
- Volvo V70 (1997–2000)1999Engine B5204T3, B5204T4, B5234T3, B5234T7, B5234T8, B5254T only
- Volvo V70 (1997–2000)2000All engines except: B5244S, B5244S2, B5244SG, B5244SG2, D5252T MSA 15.8
- Volvo V70 XC (1998–2000)1999–2000
What does this fault code mean?
The ECM compares the boost pressure sensor reading with its atmospheric pressure sensor reading at engine start, before the turbocharger has built up boost. The fault is intermittent, meaning it has occurred once or more but is not present right now.
Possible causes
- Faulty signal from the boost pressure sensor
- Contact resistance in the connections
- Defective boost pressure sensor
- Defective atmospheric pressure sensor
What you can do
- 1Switch off the ignition, then look for loose contact and oxidation at the boost sensor plug
- 2Because the fault is intermittent, clear the fault code and check whether it returns after a few engine starts
- 3If the code returns although the connectors are sound, have a workshop check the boost pressure sensor and the atmospheric pressure sensor in the control module
Symptoms you may notice5
- Check engine light comes on or behaves abnormally
- The engine is hard to start or cranks slowly
- The engine stalls or will not start
- The car lacks power, especially on take-off
- Throttle response hesitates, or the engine jerks or surges, especially on acceleration or at steady speed
General guidance for car owners. Diagnosis on the car can point to a different cause.