VOLVO
ECM-0194 - Fuel pressure sensor. Signal missing
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?
Although the code is named signal missing, it applies when the fuel pressure sensor reading is uneven or unreasonable. The engine control module monitors the signal and logs a fault when it falls outside the permitted range. The cause is either poor contact in the connectors or a damaged sensor.
Possible causes
- Loose connection, contact resistance or oxidation in the connectors
- Damaged fuel pressure sensor
What you can do
- 1Read the fault code, clear it and road test to see whether it returns
- 2Check that the connector at the fuel pressure sensor is fully engaged and free from oxidation
- 3The fuel system runs at very high pressure and can cause injury. Have a workshop make pressure checks
- 4Follow the wiring from the sensor and look for looseness, chafing and loose clips
- 5If you have a diagnostic tool, check in live data whether fuel pressure reads steadily with the engine running. An uneven value points to the sensor or connector
- 6If the fault returns after a road test, have a workshop decide whether the sensor should be replaced
Symptoms you may notice2
- Car drives poorly and lacks power
- Text message and warning symbol in the display
What the fault can affect1
- Engine torque may be limited
General guidance for car owners. Diagnosis on the car can point to a different cause.