P06D6Sensor Reference Voltage F Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- The engine module feeds sensors from several regulated 5 V reference circuits; a short at one sensor pulls the whole circuit down and all its sensors report at once – unplug them one by one to find the culprit. P06D6 is the general code for circuit F. No manufacturer document available to us uses this code; the description follows the other reference circuits. GM uses general collective codes for circuits 1–5 (4.875–5.125 V, first trip); a sixth circuit is not listed in the GM tables available to us.
- What you may notice
- Check engine light
- Several sensor codes at once
- Reduced power or limp mode
- Possibly starting problems
- Likely causes
- LikelyShort in the wire or sensor of a connected sensor
- PossibleChafing or water in harness or connector
- PossibleA connected sensor faulty internally
- RareModule internal voltage regulator or components
- 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: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.