OBD-II code · Powertrain (generic, extended)
P2390 Diesel Intake Air Flow B Control Circuit Open
Diesel Intake Air Flow B Control Circuit Open: the control circuit is open. Likely a broken wire, disconnected connector, or failed actuator.
Is it safe to drive with P2390?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen in actuator or wiring
- Less likelyPin pushed back out of connector body
- Less likelyCracked solder joint inside the module or sensor
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 1–3 h
- Emissions test
- Likely to fail
- Parts involved
- Diesel Intake Air Flow B, Diesel Intake Actuator B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.