P06D3Sensor Reference Voltage E 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
- 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. P06D3 means reference E is too low – typically a short to ground. Ram's 2023 6.7 L Cummins set P06D3 together with P0642/P0652 because of a leaking capacitor in the engine module; the fix was replacing the module. GM reports circuit E under the collective code P06D2.
- 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
- PossibleEngine module internal fault (e.g. leaking capacitor, Ram 2023)
- 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.