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.
Circuit/System Verification
2010 Saab 9-5SECTION Circuit/System Verification
NOTE:
If you can hear an engine knock, repair the engine mechanical condition before proceeding with this diagnostic. Refer to SYMPTOMS - ENGINE MECHANICAL
.
- Ignition ON, check the diagnostic trouble code (DTC) information with a scan tool. DTCs P0335, P0336 or P0338 should not set.
- If DTC P0335, P0336, or P0338 is set, refer to Engine Management And Fuel System, V6 DTC Index for diagnosis of DTC P0335, P0336, or P0338.
- Clear the DTCs with a scan tool.
- Turn OFF the ignition for 30 s.
- Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
- If DTC P0324 failed this ignition, replace the K20 ECM.
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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.