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 MANUALSPONTIAC2006G6 GTP, 2D COUPE, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1181 (HYBRID ENGINE CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P0A37CIRCUIT/SYSTEM TESTING
2006 Pontiac G6 GTP, 2D Coupe, Standard
Circuit/System Testing
2006 Pontiac G6 GTP, 2D Coupe, StandardSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2008 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
- Verify DTCs P0A38 or P0A39 are not set.
- If P0A38 or P0A39 are set diagnose those first.
- Ignition OFF, disconnect harness connectors from the SGCM. Refer to Generator Control Module Replacement
- Test for 120 - 125 kohms between the signal circuit SGCM X2 terminal 2 and the low reference circuit terminal 14.
- If within the specified range, replace the SGCM.
- Disconnect the 7 pin X1 connector at the MGU. Refer to Generator with Starter Replacement
- Test for infinite resistance between the SGCM X2 connector terminal 2 and ground.
- If less than the specified value, test the circuit for short to ground.
- Test for less than 1 ohm between the SGCM X2 connector terminal 2 and the MGU X1 connector terminal G.
- If greater than the specified value, test the circuit for an open/high resistance.
- Test for less than 1 ohm between SGCM X2 connector terminal 14 and the MGU X1 connector terminal F.
- If greater than the specified value, test the circuit for an open/high resistance.
- If circuits test normal, replace the MGU.
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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.