Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC 84 - Accelerator Pedal Position (App) Circuit Fault: Notes
The Accelerator Pedal Position (APP) module provides a voltage signal that changes relative to accelerator position. There are 3 sensors located within the APP module that are scaled differently. DTC 84 will set when the PCM has recognized an intermittent APP fault and there are no other current APP faults set. PCM will default to when DTC 84 is set, a current and history DTC will set but will not turn on the SERVICE THROTTLE SOON light, and the vehicle will operate with limited power.
- This step determines if DTC 84 is the result of a hard failure or an intermittent condition.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.