P2126 code meaning
Throttle/Pedal Position Sensor/Switch E Circuit Range/Performance
What P2126 means
Signal E is electrically intact but its value does not fit the situation. Ford's 2012 OBD summary uses P2126 for the second pedal sensor on Gen2 throttle systems: it sets when sensors D and E disagree by more than 1.1 degrees, as a non-MIL fault with the wrench lamp. Mitsubishi lists P2126 as accelerator pedal sensor E on the 2022 Outlander. Many newer systems report the same disagreement as P2138 instead. P2125 is the general circuit fault, P2127/P2128 are voltage below or above limits, P2129 covers dropouts. The vehicle usually stays drivable with softened pedal response; on Ford the MIL stays off and only the wrench lamp lights.
P2126 at a glance
- Check engine lightUsually not
- 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 P2126
- Wrench or engine warning lamp on
- Softened or delayed acceleration
- Idle may be raised when braking
Common causes of P2126
- Most likelyWorn or dirty sensor track E giving offset readings
- PossibleContact resistance at the pedal connector
- Less likelyShared reference or ground circuit shifting one signal
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Accelerator pedal position sensorPedal sensor wiringECM
What each part of P2126 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. |
| 26 | The exact fault in that area. |
What to do next
- Note P2126 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 P2126
What does P2126 mean?
P2126 means "Throttle/Pedal Position Sensor/Switch E Circuit Range/Performance". Signal E is electrically intact but its value does not fit the situation. It is a generic code, so it means the same on every make.
Is it safe to drive with P2126?
Drive gently and only to a workshop. With P2126 the car can go into limp mode (reduced power) to protect itself.
Will P2126 fail an emissions test?
Yes, it can. P2126 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 P2126 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 P2126 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.