P2139 code meaning
Throttle/Pedal Position Sensor/Switch D/F Voltage Correlation
Powertrain system Generic code P21xx codes Check engine light
What P2139 means
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.
P2139 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2139
- Engine or wrench warning lamp on
- Softened or delayed acceleration
Common causes of P2139
- Most likelyTrack D or F of the pedal sensor worn or drifted
- PossibleContact resistance at the pedal connector
- Less likelyFault on a shared ground or 5 V reference
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Throttle position sensorAccelerator pedal position sensor
What each part of P2139 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 1 | Area: fuel and air metering. |
| 39 | The exact fault in that area. |
What to do next
- Note P2139 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2139
What does P2139 mean?
P2139 means "Throttle/Pedal Position Sensor/Switch D/F Voltage Correlation". P2139 compares signals D and F, in practice the first and third tracks of a three-track accelerator pedal. It is a generic code, so it means the same on every make.
Is it safe to drive with P2139?
Drive gently and only to a workshop. With P2139 the car can go into limp mode (reduced power) to protect itself.
Will P2139 fail an emissions test?
Yes, it can. P2139 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2139 to fix?
Difficulty: easy. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2139 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.