P1202 GMC Code - Gas Mass Sensor Circuit Low Frequency
Quick Answer
The P1202 code for GMC vehicles indicates a problem with the Gas Mass Sensor Circuit Low Frequency. Common causes include Faulty Gas Mass Sensor, Damaged wiring or connectors in the sensor circuit, Issues with the engine control module (ECM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1202 GMC indicates Gas Mass Sensor Circuit Low Frequency.
- Common causes
- Common causes include Faulty Gas Mass Sensor, Damaged wiring or connectors in the sensor circuit, Issues with the engine control module (ECM).
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1202 GMC Description
The P1202 code for GMC vehicles indicates a problem with the Gas Mass Sensor Circuit Low Frequency. This sensor is responsible for measuring the amount of air entering the engine to adjust the fuel mixture accordingly for optimal combustion. When the sensor detects low frequency signals, it means that there is an issue with the sensor or the circuit that could potentially lead to a lean fuel mixture and poor engine performance.
Common Causes of P1202 GMC
- Faulty Gas Mass Sensor
- Damaged wiring or connectors in the sensor circuit
- Issues with the engine control module (ECM)
- Vacuum leaks in the intake system
- Dirty or clogged air filter
Symptoms of P1202 GMC
- Decreased fuel efficiency
- Rough idling or engine stalling
- Hesitation or lack of power during acceleration
- Increased emissions
- Illumination of the Check Engine Light
How to Fix P1202 GMC
- Diagnose the root cause of the issue by using a scan tool to retrieve the fault code and inspecting the Gas Mass Sensor and related components.
- Replace the Gas Mass Sensor if it is found to be faulty. Ensure that the new sensor is compatible with the vehicle's make and model.
- Check and repair any damaged wiring or connectors in the sensor circuit. Make sure all connections are secure and free of corrosion.
- Inspect the engine control module (ECM) for any signs of damage or malfunction. Replace the ECM if necessary.
- Clear the fault code from the vehicle's memory and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P1202 GMC
The typical repair costs for addressing a P1202 code related to the Gas Mass Sensor Circuit Low Frequency can vary depending on the specific cause of the issue. In general, the cost of replacing a Gas Mass Sensor can range from $100 to $300, while diagnosing and repairing wiring or ECM issues may cost between $200 and $500. Labor costs at auto repair shops can range from $80 to $150 per hour, so the total repair cost could be anywhere from $200 to $800 or more. It is recommended to check with local auto repair shops for a more accurate estimate based on the specific make and model of the vehicle.
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