Powertrain
generic / SAE
P239A
Diesel Intake Air Flow B Position Sensor Circuit Intermittent or Erratic
Same as P2396 with intermittent or erratic signal. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number3 / 9A
Possible causes
- Intermittent contact at connector high
- Connector with intermittent contact under vibration low
- Harness routed against vibrating component low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 150–500 €
- Estimated time: 0.8–2 h
- Component: diesel intake air flow b position sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012