Pontiac Automotive Repair Questions

PontiacĀ Cars and SUV's.

HereĀ is a list of auto repair questions and answers.

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Common Engine Codes

Oxygen Sensor Code P0130 - P0141

The powertrain control module (PCM) supplies a bias voltage of about 450 mV between the heated oxygen sensor (HO2S) high signal circuit and the HO2S low reference circuit. When measured with a 10 mega ohm digital voltmeter, this may display as low as 350 mV. The oxygen sensor signal varies from about 800 mV when the exhaust is rich, to about 50 mV when the exhaust is lean.

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How Things Work

Traction Control Light- What Does It Mean

When wheel slip is noted while the brake is not applied, the ABS Computer-(EBCM) will enter traction control mode.

First, the EBCM requests the PCM to reduce the amount of torque to the drive wheels via the requested torque signal circuit. The PCM reduces torque to the drive wheels by retarding spark timing and turning off fuel injectors. The PCM reports the amount torque delivered to the drive wheels via the delivered torque signal circuit.

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