What Does P1286 Mean?
The accelerator pedal position sensor is receiving voltage higher than the expected range. This typically indicates a problem with the 5-volt reference circuit supplying the sensor.
Safety Warning
Vehicle may enter limp mode with severely limited throttle response or may not accelerate properly. This is a serious safety concern in traffic and should be repaired immediately.
Common Causes
30%
Short to voltage in 5V reference circuit
30%
Failed accelerator pedal position sensor internal circuit
25%
PCM 5V reference circuit regulator failure
15%
Damaged or corroded sensor connector
Diagnostic Steps
1
Step 1: Disconnect accelerator pedal position sensor and measure 5V reference voltage at PCM connector
2
Step 2: Check for short to battery voltage in reference circuit wiring
3
Step 3: Measure resistance of sensor circuits to verify no internal short
4
Step 4: Test sensor with known-good 5V supply to verify sensor operation
5
Step 5: Check for other sensors on same 5V reference circuit experiencing issues
Estimated Repair Cost
$200 - $800
Parts + labor, varies by vehicle and location
The accelerator pedal position sensor is receiving voltage higher than the expected range. This typically indicates a problem with the 5-volt reference circuit supplying the sensor.
The most common cause of P1286 (Accelerator Pedal Position Sensor Supply Voltage Too High) is: Short to voltage in 5V reference circuit
Typical repair costs for P1286 range from $200 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may enter limp mode with severely limited throttle response or may not accelerate properly. This is a serious safety concern in traffic and should be repaired immediately.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1286 to identify the root cause.
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Quick Info
Category
Powertrain
System
Electronic Throttle Control
Difficulty
Type
Manufacturer
Recommended Tools
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