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.
Diagnostic Aids
Scan tool displays throttle position in volts. Voltage should be about .45-.85 volt with throttle closed and ignition on. Voltage should steadily increase as throttle is moved toward wide open throttle. Scan tool throttle angle percentage will display as zero percent with closed throttle and 100 percent with wide open throttle. Check connector and sensor terminals for moisture or corrosion. Clean and replace as necessary. If corrosion is found, check connector seal and repair or replace as necessary. If DTC is intermittent, see the TESTS W/O CODES article.
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Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.