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.
Circuit/System Verification
- Electromagnetic interference (EMI) on the speed sensor signal circuit may cause erratic cruise control operation.
- Inspect for proper operation of the clutch pedal position (CPP) sensor. Do not perform this diagnostic if DTC P0806, P0807, P0808 or P080A are stored in the ECM. Refer to DTC P0806 , DTC P0807 or P0808 , DTC P080A (MU3) or DTC P0806 , DTC P0807 or P0808 , DTC P080A (Getrag 5 Speed) if this DTC is set in the ECM as current or history.
Engine ON, while rotating the steering wheel to both steering stops, observe the scan tool Cruise Control Switch parameter while pressing each of the cruise control switches. The parameter should toggle between On, Off, Resume and Set as the applicable switch is pressed.
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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.