P2D19Exhaust Flow Control Valve C Position Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2D19 is stored when the angle feedback from actuator C drops beneath the bottom of its permitted band. With an analog sensor the line then reads close to zero volts, mostly through a ground short or a lost 5 V supply; with a PWM return the duty cycle hangs close to zero. No manufacturer documents P2D19. The nearest public examples belong to valve A: in bulletin 01-004/20 Mazda links P2BF6 to a low reading from the shutter valve sensor on its cylinder deactivation engine, curing it with new PCM software, and Deutz MD1 engines store P2BF6 when flap voltage falls too low. In GM's 23OBDG07 tables an exhaust valve feedback under 2 percent duty cycle fails after 4 seconds. If flaps share a sensor supply, a low on several of them points to that reference rather than to sensor C.
- What you may notice
- Check engine light
- Flap C no longer adjusted, default position held
- Possible power reduction on engines that tie the flap to cylinder deactivation
- Likely causes
- LikelyFeedback wire shorted to ground
- PossibleMissing sensor supply voltage or open supply wire
- PossiblePosition sensor in actuator C failed low
- RareFaulty evaluation logic in the engine software
- 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: €0 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.