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.
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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1942 (HYBRID/EV CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P0A2FCIRCUIT/SYSTEM VERIFICATION
2006 Chevrolet Suburban C2500, 6.0 U
Circuit/System Verification
2006 Chevrolet Suburban C2500, 6.0 USECTION Circuit/System Verification
WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
- Verify that DTC P0A2C is not set.
- If DTC P0A2C is set, Refer to DTC P0A2B-P0A2D or P0A31-P0A33 .
- Ignition ON, observe the scan tool ECM engine coolant temperature (ECT) parameter in freeze frame data. The reading should be below 125°C (257°F).
- If the ECT was above 125°C (257°F) when the DTC set, go to Symptoms - Engine Cooling and correct that concern first.
- Ignition ON, observe the scan tool motor 1 temperature and motor 2 temperature parameters in freeze frame data. The reading should be above 200°C (392°F). If greater than the specified value, go to Automatic Transmission Overheating . If the transmission tests normal, replace M15A drive motor 1 generator.
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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.