P2D14Exhaust Flow Control Valve C Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- With P2D14 the drive wire of flap C is dragged toward ground when the driver expects a higher level. Chafed insulation touching the body or the exhaust, a crushed harness after the car was jacked up, or a shorted actuator winding are the classic reasons. No manufacturer documents P2D14. For the A and B flaps, the Ford 2024 OBD summary handles a ground short as subtype 11 of its smart driver check, run over a 5 second window, and GM's 24OBDG07 tables store P2BF9 for a grounded exhaust valve PWM line after 4 seconds once the supply exceeds 9 V, lighting the MIL on the second trip. CARB wants actuator circuits checked for values outside their range. As the wire is intact but shorted, a continuity test can pass; check the insulation to ground along the whole run instead.
- What you may notice
- MIL on
- Flap C does not move or stays at its default angle
- Exhaust louder or quieter than the selected mode
- Likely causes
- LikelyControl wire chafed through and touching ground
- PossibleShorted winding or electronics in the valve C actuator
- RareWater or salt bridging pins in the connector
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.