Powertrain
generic / SAE
P2390
Diesel Intake Air Flow B Control Circuit Open
Long-term plausibility checks show that the front oxygen sensor on bank 1 reacts too slowly or stays too close to a fixed value. The signal does not show normal cross-counts during closed-loop operation.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number3 / 90
Possible causes
- Open in actuator or wiring high
- Pin pushed back out of connector body low
- Cracked solder joint inside the module or sensor low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 200–800 €
- Estimated time: 1–3 h
- Component: diesel intake air flow b
- Component: diesel intake actuator b
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012