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.
Pinpoint Test Aa: Auto Start Stop
Normal Operation and Fault Conditions
Refer to the DTC Fault Trigger Conditions.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| PCM P164C:00 | Internal Control Module Start-Stop Performance: No Sub Type Information | Sets when an error occurs in the PCM. This DTC may be accompanied by other Diagnostic Trouble Codes (DTCs). Check for other Diagnostic Trouble Codes (DTCs) and diagnose those first. If no Diagnostic Trouble Codes (DTCs) are present, continue to follow diagnosis for this DTC. |
| PCM P168E:00 | Internal Control Module Monitoring of Engine Start Authorization: No Sub Type Information | Sets when an error occurs in the PCM. This DTC may be accompanied by other Diagnostic Trouble Codes (DTCs). Check for other DTCs and diagnose those first. If no other DTCs are present, continue to follow diagnosis for this DTC. |
Possible Sources
- Aftermarket performance products
- Module programming error
- PCM configuration
- PCM (12A650)
Use the Manual With the Right Hardware
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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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