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 Trouble Code Memory, Checking
Procedure
-- Connect the scan tool.
-- Switch the ignition to the "ON" position.
-- Select "Diagnostic Mode 03 - Interrogating Fault Memory".
-- The stored DTC or DTC's will be displayed on the scan tool screen.
The following table is an example of the DTC information that may be displayed on the scan tool screen:
| Indication example | Explanation |
|---|---|
| P0444 | SAE Diagnostic Trouble Code (DTC) |
| Evaporative Emission (EVAP) Canister Purge Regulator Valve | Malfunctioning wiring path or malfunctioning component |
| Circuit Open | Malfunction type as next |
-- Refer to the following DTC tables for the diagnostic repair procedure:
- SAE P0xxx Diagnostic Trouble Codes SAE P0XXX DIAGNOSTIC TROUBLE CODES .
- SAE P1xxx Diagnostic Trouble Codes SAE P1XXX DIAGNOSTIC TROUBLE CODES .
- SAE P2xxx Diagnostic Trouble Codes SAE P2XXX DIAGNOSTIC TROUBLE CODES .
- SAE P3xxx Diagnostic Trouble Codes SAE P3XXX DIAGNOSTIC TROUBLE CODES .
- SAE U0xxx Diagnostic Trouble Codes SAE U0XXX DIAGNOSTIC TROUBLE CODES .
-- Switch the ignition off.
End of Procedure
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.