OIC 000091.02 – Accelerator Pedal Potentiometer, Voltages at Channel 1 and Channel 2 Not in the Correct Ratio

OIC 000091.02 (OIC 91.02)

Code: 000091.02

Shortcode: 91.02


This error code indicates a mismatch between the output signals of the accelerator pedal potentiometer. Specifically, the voltage at channel 1 must be double the voltage of channel 2. When this ratio is incorrect, the control system detects an anomaly in the potentiometer signals.


When this error is detected, the control software limits or disables the function of the accelerator pedal potentiometer. This may result in reduced responsiveness or complete non-functionality of the accelerator pedal, impacting the vehicle’s ability to accelerate.


Inspect Potentiometer Connections:

  • Check the wiring and connections to the accelerator pedal potentiometer for any signs of damage, loose connections, or corrosion. Repair or replace as necessary.

Test Potentiometer Output:

  • Use a multimeter to measure the output voltages at channel 1 and channel 2 of the potentiometer. Verify that channel 1’s voltage is exactly double that of channel 2. If the readings do not match, the potentiometer may be faulty and require replacement.

Update Control Software:

  • Ensure that the control software is up-to-date. Firmware updates may include fixes for known issues and improved handling of potentiometer signals.

Consult Manufacturer Support:

  • If the problem persists after checking the connections and testing the potentiometer, consult technical support or the manufacturer for further diagnostics and potential replacement parts.

Monitor System Performance:

  • After taking corrective actions, monitor the system to ensure that the error does not recur. Pay attention to any irregularities in accelerator response that could indicate ongoing issues.


Ensure regular maintenance and inspection of the accelerator pedal potentiometer and its connections to prevent future occurrences of this issue. In some cases, environmental factors such as moisture or extreme temperatures may affect the potentiometer’s performance, so consider these elements during troubleshooting.

Control Units: John Deere

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