OBD-II Error Code P1201 - Accelerator Pedal Position Sensor 1 Circuit High

OBD-II Standard OBD-II Major Throttle

Model: SAE J2012 Extended | Code: P1201

Applicable Systems
OBD-II

Symptoms

The APP sensor 1 signal is above the expected range. The engine may have reduced power or enter limp mode.

Possible Causes

  • APP sensor 1 failed high internally
  • Wiring harness shorted to reference voltage
  • APP sensor connector damaged
  • Accelerator pedal return spring weak
  • ECM reference voltage fault

Troubleshooting Steps

  1. Step 1: Connect an OBD-II scan tool and read all stored DTCs and freeze frame data
    All DTCs and freeze frame data are retrieved
  2. Step 2: Inspect the related sensor or actuator wiring for damage, corrosion, or loose connections
    Wiring and connectors are in good condition
  3. Step 3: Use a digital multimeter to check sensor voltage, resistance, and reference signals per manufacturer specifications
    Values are within specified range
  4. Step 4: Perform component-level testing of the suspected sensor or actuator
    Component passes or fails definitively
  5. Step 5: Clear codes and road test to verify repair
    Code does not return and system operates normally

How to Reset

To reset code P1201: 1) Repair the underlying fault. 2) Use an OBD-II scan tool to clear the DTC. 3) Perform a drive cycle to verify the monitor completes. 4) If the code returns, further diagnosis is needed.

Frequently Asked Questions

  • Q: What does OBD-II code P1201 mean?

    Code P1201 indicates: Accelerator Pedal Position Sensor 1 Circuit High. This is a GM manufacturer-specific diagnostic trouble code.

  • Q: Is code P1201 serious?

    Severity: Major. Immediate attention is recommended to prevent further damage.

  • Q: Can I drive with code P1201?

    It is not recommended to drive with this code active as it may cause further damage.

  • Q: How do I fix code P1201?

    Diagnose the Throttle system, check wiring and connectors, test the related sensor or actuator, and replace faulty components as needed.

Related OBD-II Standard Fault Codes

Comments (0)

Share your experience to help others facing the same problem.

No comments yet. Be the first to share your experience!

Leave a Comment

Source: OBD-II Manufacturer Extended Codes / SAE J2012 / OBD-Codes.com

Category: OBD-II