P2139Throttle/Pedal Position Sensor/Switch D/F Voltage Correlation
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2139 compares signals D and F, in practice the first and third tracks of a three-track accelerator pedal. No manufacturer publishes a detection rule for this exact code; FCA only lists P2139 in emissions recall T21 for the 2004-2006 Dodge Sprinter among codes that can appear after the ECU update. Makers with three-track pedals handle the comparison differently: GM's 2004-2005 trucks scale sensor 3 and test it against sensors 1 and 2 at 0.26 V, then blame the odd track through P2131 or P2126 instead of naming a pair, and Ford reports a deviating track F as P2131. A pair code like P2139 cannot say which of the two tracks is wrong, so check both with a scope while moving the pedal. Effects are a warning lamp and softened acceleration.
- What you may notice
- Engine or wrench warning lamp on
- Softened or delayed acceleration
- Likely causes
- LikelyTrack D or F of the pedal sensor worn or drifted
- PossibleContact resistance at the pedal connector
- RareFault on a shared ground or 5 V reference
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €20 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.