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.
Scan Tool Display
The following DTC statuses are indicated only when they apply to the DTC set:
- Fail This Ign. (Fail This Ignition) - Indicates that this DTC failed during the present ignition cycle.
- Last Test Fail - Indicates that this DTC failed the last time the test ran. The last test may have run during a previous ignition cycle if an "A" or "B" type DTC is displayed. For type "C" DTCs, the last failure must have occurred during the current ignition cycle to appear as last test fail.
- MIL Request - Indicates that this DTC is currently requesting the MIL. This selection will report type "B" DTCs only when they have requested the MIL (failed twice).
- Test Fail SCC (Test Failed Since Code Clear) - Indicates that this DTC that has reported a failure since the last time DTCs were cleared.
- History - Indicates that the DTC is stored in the PCM History memory. Type "B" DTCs will not appear in History until they have requested the MIL (failed twice). History will be displayed for all type "A" DTCs and type "B" DTCs (which have requested the MIL) that have failed within the last 40 warm-up cycles. Type "C" DTCs that have failed within the last 40 warm-up cycles will also appear in History.
- Not Run SCC (Not Run Since Code Clear) - DTCs will be listed in this category if the diagnostic has not run since DTCs were last cleared. This status is not included with the DTC display since the DTC can not be set if the diagnostic has not run. This information is displayed when DTC Info is requested using the scan tool.
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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.
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