P2CD6Turbocharger/Supercharger Boost Sensor D Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- A fourth boost pressure sensor, D, is only needed where charge pressure is read at four points, for example on twin-turbo engines with two stages per bank or on combinations of supercharger, turbocharger and electric compressor. Which tap gets the letter is up to the manufacturer. P2CD6 is the umbrella fault for this sensor's circuit when the module does not or cannot separate low, high and implausible readings; those have their own codes P2CD7 to P2CD9. No manufacturer documents P2CD6 publicly, and no lost-communication code for a digital sensor D is defined. CARB requires every such input to be checked for circuit faults. By analogy with sensor A, Ford's 2024 petrol engines check the signal continuously and need 5 s to register a fault. Boost control on the affected path is usually cut back.
- What you may notice
- Warning lamp on
- Reduced boost and noticeably less power
- Other sensor codes at the same time if a shared 5 V supply is affected
- Likely causes
- LikelyCorroded or loose connector, chafed wire at sensor D
- PossibleBoost sensor D internally faulty
- Possible5 V reference or sensor ground interrupted
- RareInput stage of the engine control module faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.