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 MANUALSPONTIAC2006WAVE BASE, 4D SEDAN, Y4M/MLMREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - 1.6L (L91) - DTC P0420 TO DTC P2076DTC P1121 OR P1122COMPONENT TESTING
2006 Pontiac Wave Base, 4D Sedan, Y4M/MLM
Component Testing
2006 Pontiac Wave Base, 4D Sedan, Y4M/MLMSECTION Component Testing
- Ignition OFF, disconnect the harness connector of the TP sensor.
- Measure for 1,160-1,175 ohms between the 5-volt reference and the low reference terminals of the applicable TP sensor.
- If the resistance is not within the specified range, replace the TP sensor.
- Measure the resistance between the signal terminal and the low reference terminal of the TP sensor. Sweep the TP sensor through the entire range. The resistance should vary between 1,530-630 ohms without any spikes or dropouts.
- If the resistance is not within the specified range or is erratic, replace the TP sensor.
- Apply 5 volts and ground to the applicable terminals of the TP sensor, and measure the voltage between the signal and the low reference terminals. Sweep the TP sensor through the entire range. The voltage should vary between 4.3-0.6 volts without any spikes or dropouts.
- If the voltage is not within the specified range or is erratic, replace the TP sensor.
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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.