Network
generic / SAE
U0650
Lost Communication With Exhaust Pressure Control Valve A Sensor/Switch
The vehicle bus reports loss of communication with smart exhaust pressure control valve A position sensor/switch (typically used for exhaust brake or DPF regeneration). Closed-loop control loses its feedback.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number6 / 50
Possible causes
- Bus wiring open or shorted high
- Module without power or ground medium
- Module failed medium
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–1000 €
- Estimated time: 0.5–3 h
- Component: exhaust pressure valve a sensor
- Component: vehicle bus wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012