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 MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 542 (ENGINE CONTROLS AND FUEL - 3.5L - DTC P0010 TO DTC P0411)DTC P0102 OR P0103CIRCUIT/SYSTEM TESTING
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Circuit/System Testing
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2007 Chevrolet Monte Carlo and 2007 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect for any contamination, water intrusion, or debris on the sensing elements of the MAF sensor.
- If debris is present, clean the sensor. If the sensor cannot be cleaned, replace the sensor.
- Ignition OFF, disconnect the harness connector at the MAF sensor.
- Test for less than 5 ohms of resistance between the ground circuit terminal C and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify that a test lamp illuminates between the ignition 1 circuit terminal B and ground.
- If the test lamp does not illuminate, test the ignition 1 circuit for a short to ground or an open/high resistance. If the circuit test normal and the fuse for the ignition 1 voltage circuit is open, test or replace the MAF sensor.
- Ignition ON, test for 4.8-5.2 volts between the signal circuit terminal A and ground.
- If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the control module.
- If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the control module.
- Turn OFF the ignition and connect the red lead of the J 38522 to the signal circuit at the MAF sensor harness connector and the black lead to a good ground. See Special Tools .
- Start the engine and observe the MAF sensor for 4,950-5,025 Hz with a scan tool.
- If the MAF sensor is not within the specified range, test for intermittent or poor connection at the control module. If circuit tests normal, replace the control module.
- If the MAF sensor is within the specified range, test for intermittent or poor connection at the MAF sensor. If tests normal, replace the MAF sensor.
IMPORTANT:
To set up the J 38522
, place the duty cycle to normal, the frequency to 5 K, and the signal switch to 5 volts. See Special Tools
.
RENDER: 1.0x
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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.