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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISELECTRICALINSTRUMENT PANEL SYSTEM DISPLAYS, GAUGES AND CONSOLEDIAGNOSTIC INFORMATION AND PROCEDURESDTC P0520CIRCUIT/SYSTEM TESTING
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Circuit/System Testing
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Circuit/System Testing
IMPORTANT:
Do not turn the key to the crank position or engage the starter at any time during diagnosis.
- Turn the ignition ON, with the engine OFF.
- With the ignition ON, install a scan tool and observe the Engine Oil pressure Switch parameter in the IPC ECM Data List.
- If the Engine Oil Pressure Switch parameter displays OK, disconnect the engine oil pressure switch, connect a 3-amp fused jumper wire between the signal circuit of the EOP switch and a good ground.
- With the scan tool installed observe the Engine Oil pressure Switch parameter in the IPC ECM/PCM Data List.
- If the Engine Oil Pressure Switch parameter displays Low, check for a poor connection at the harness connector of the engine oil pressure (EOP) switch.
- If the harness connector is normal, replace the engine oil pressure switch.
- If the Engine Oil Pressure Switch parameter displays OK, check the signal circuit of the EOP switch for an open, for a high resistance or for a short to voltage.
- If the signal circuit tests normal, check for a poor connection at the harness connector of the ECM/PCM.
- If the harness connector is normal, replace the ECM/PCM.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.