P2D13Exhaust Flow Control Valve C Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2D13 tells that the drive circuit of a third exhaust flap, valve C, is open or cannot be evaluated. Such a valve only exists on layouts with more than two controlled flaps, for instance a separate bypass in the rear silencer next to one flap per bank. No manufacturer publishes P2D13 or any other valve C code. Ford's 2020-2024 OBD summaries know only valve A on bank 1 and valve B on bank 2; there a smart driver watches the output all the time and flags an open within about 5 seconds under subtype 13. GM's 23OBDG07 tables run the same open-circuit test on an exhaust valve PWM line, but report it as the valve B code P2BF8 after 4 seconds. Under CARB rules, output components like this need circuit monitoring. A connector left off after exhaust work, a broken wire or an internal open in the actuator are the usual finds.
- What you may notice
- Check engine light
- Flap C stays in its rest position, exhaust sound does not change
- Message that an exhaust or drive mode is unavailable
- Likely causes
- LikelyActuator connector unplugged or loose after exhaust work
- PossibleBroken control wire near the hot exhaust or at a bracket
- PossibleInternal open in the valve C actuator
- RareFailed output stage in the control module
- 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.