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
I/M System Status display provides an indication of when PCM has completed required tests. This does not mean test has passed, only that a decision was made. If diagnostic fails, a DTC will indicate failure. If failure indication is present for a DTC associated with one of the I/M regulated systems, failure may prevent other required tests from running. Example: a DTC for control circuit of the relay controlling an AIR pump may not be listed in INSPECTION/MAINTENANCE SYSTEM DIAGNOSTIC TROUBLE CODES table because DTC is a continuous test. If this DTC is set, active tests for AIR system may not run. The I/M System Status information may be useful for a technician to determine if diagnostics have run when verifying repairs.
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.