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 K2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1353 (HYBRID ENGINE CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P1AF0 OR P1AF2CIRCUIT/SYSTEM VERIFICATION
2006 Chevrolet Suburban K2500, 6.0 U
Circuit/System Verification
2006 Chevrolet Suburban K2500, 6.0 USECTION Circuit/System Verification
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect for DTC P1AE7.
- If the DTC is set, the loss of isolation has occurred within the drive motor generator battery. Diagnose this concern first. Refer to DTC P1AE6 or P1AE7 .
- Inspect for DTCs P0A78, P0A79, P0BFD, P0BFE, P0C01, or P0C04.
- If any of the DTCs are set, the loss of isolation has occurred within the 3-phase components. Diagnose this concern first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Clear the DTC information.
- Turn the ignition OFF for 1 minute.
- Turn the ignition ON.
- Operate the vehicle within the Conditions for Running the DTC.
- Retest for DTCs P1AF0 and P1AF2.
IMPORTANT:
DTC P1AE7 must test and pass before performing this diagnostic procedure.
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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.