What Does P1280 Mean?
The ECM has detected an electrical fault in the accelerator pedal position sensor 2 circuit. Modern throttle-by-wire systems use redundant sensors for safety.
Safety Warning
Vehicle may enter limp mode with limited throttle response. May experience sudden loss of throttle control. Do not drive until repaired.
Common Causes
40%
Faulty accelerator pedal position sensor assembly
30%
Damaged wiring or connector to APP sensor
20%
Corroded or loose connector pins
10%
ECM internal circuit failure
Diagnostic Steps
1
Step 1: Inspect APP sensor connector for corrosion, damage, or loose connection
2
Step 2: Check reference voltage supply to APP sensor (typically 5V)
3
Step 3: Monitor APP sensor 2 voltage with scan tool while moving pedal slowly
4
Step 4: Compare APP sensor 1 and sensor 2 voltage readings for correlation
5
Step 5: Check wiring harness for shorts, opens, or resistance issues
Estimated Repair Cost
$200 - $600
Parts + labor, varies by vehicle and location
The ECM has detected an electrical fault in the accelerator pedal position sensor 2 circuit. Modern throttle-by-wire systems use redundant sensors for safety.
The most common cause of P1280 (Accelerator Pedal Position (APP) Sensor 2 Circuit) is: Faulty accelerator pedal position sensor assembly
Typical repair costs for P1280 range from $200 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may enter limp mode with limited throttle response. May experience sudden loss of throttle control. Do not drive until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1280 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Electronic Throttle Control
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
