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 Description
For circuit description, see CIRCUIT DESCRIPTION under DTCs P2120, P2122, P2123, P2125, P2127, P2128 OR P2138. DTC P2121 is set when difference between VPA and VPA2 is out of threshold and condition continues for .5 seconds. Possible cause is a faulty accelerator pedal position sensor.
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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.