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Diagnosis & Testing: Notes

NOTE: For additional information on self-diagnostic system (including diagnosis of codes not covered in this article), see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

Diagnostic Trouble Codes (DTC) are retrieved using a scan tool. Fault codes related to Electronic Variable Orifice (EVO) system are Powertrain Control Module (PCM) engine DTC(s) P0636 and P0637, which set when EVO circuit switches from low to high voltage.