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
If a short to voltage on control circuit or a shorted fuel injector exists when fuel injector is commanded on, ECM will open driver circuit for protection and current draw will be low.
Fuel in the oil is a good indication of a leaking or grounded injector.
To locate an intermittent problem, start engine and use scan tool to monitor MISFIRE CURRENT CYL. of affected cylinder. If a fuel injector fault exists, a misfire will occur on affected cylinder and misfire counter will count up.
Fuel injector resistance should be 12-13 ohms at 74°F (23°C).
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.