VOLVO
ECM-0236 - Boost pressure sensor (MAP). 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 (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 control module keeps checking whether the boost sensor reading matches how the sensor should behave. If the signal becomes uneven or falls outside reasonable values, a fault is logged and the control module uses a calculated boost pressure instead. The cause is poor contact in the connections or a damaged sensor.
Possible causes
- Loose connection, contact resistance or oxidation in the connections
- Damaged boost pressure sensor
What you can do
- 1Read the fault code, clear it and road test to see whether it returns
- 2Check the boost pressure sensor connector: is it fully engaged and free from oxidation?
- 3Follow the cable from the sensor and look for chafing, pinched sections and loose clips
- 4If you have a diagnostic tool, check in live data whether boost pressure changes smoothly as the accelerator is pressed and released
- 5If the fault returns after a road test, have a workshop decide whether the boost pressure sensor should be replaced
Symptoms you may notice1
- Check engine light comes on or behaves abnormally
What the fault can affect1
- A calculated boost pressure is used instead
General guidance for car owners. Diagnosis on the car can point to a different cause.