What Does P1630 Mean?
The accelerator pedal position sensor circuit 1 is reporting a voltage signal that is below the expected minimum threshold. This prevents the PCM from accurately determining driver throttle input demand.
Safety Warning
Vehicle may enter reduced power mode or fail to respond to throttle input, creating dangerous merging and acceleration situations. Do not drive until repaired.
Common Causes
40%
Faulty accelerator pedal position sensor assembly
30%
Wiring short to ground or open circuit in APP sensor 1 signal wire
20%
Corroded or damaged connector at pedal sensor
10%
Low voltage supply to APP sensor from PCM
Diagnostic Steps
1
Step 1: Monitor APP sensor 1 voltage with scan tool while slowly depressing accelerator pedal
2
Step 2: Check reference voltage supply to APP sensor (typically 5V) at sensor connector
3
Step 3: Inspect accelerator pedal sensor connector for corrosion, water, or damaged pins
4
Step 4: Test sensor signal wire continuity and resistance from pedal to PCM
5
Step 5: Measure APP sensor 1 voltage directly at sensor terminals to isolate wiring vs sensor fault
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The accelerator pedal position sensor circuit 1 is reporting a voltage signal that is below the expected minimum threshold. This prevents the PCM from accurately determining driver throttle input demand.
The most common cause of P1630 (Accelerator Pedal Position Sensor 1 Signal Too Low) is: Faulty accelerator pedal position sensor assembly
Typical repair costs for P1630 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may enter reduced power mode or fail to respond to throttle input, creating dangerous merging and acceleration situations. 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 P1630 to identify the root cause.
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Quick Info
Category
Powertrain
System
Throttle Control System
Difficulty
Type
Manufacturer
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