P1220 GMC Code - Throttle Position Sensor 2 Circuit
Quick Answer
The P1220 diagnostic trouble code (DTC) for GMC vehicles refers to an issue with the Throttle Position Sensor 2 Circuit. Common causes include Faulty Throttle Position Sensor 2, Damaged wiring or connectors in the TPS circuit, ECM malfunction. 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
- P1220 GMC indicates Throttle Position Sensor 2 Circuit.
- Common causes
- Common causes include Faulty Throttle Position Sensor 2, Damaged wiring or connectors in the TPS circuit, ECM malfunction.
- 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 P1220 GMC Description
The P1220 diagnostic trouble code (DTC) for GMC vehicles refers to an issue with the Throttle Position Sensor 2 Circuit. The throttle position sensor (TPS) is a crucial component of the engine management system, responsible for monitoring the position of the throttle valve and sending this information to the engine control module (ECM). In this case, TPS 2 specifically relates to the second throttle position sensor in the system.
Common Causes of P1220 GMC
- Faulty Throttle Position Sensor 2.
- Damaged wiring or connectors in the TPS circuit.
- ECM malfunction.
- Corrosion or contamination affecting sensor performance.
- Mechanical issues with the throttle valve or related components.
Symptoms of P1220 GMC
- Poor acceleration or hesitation when pressing the gas pedal.
- Rough idling or stalling when the vehicle is at a stop.
- Reduced fuel efficiency.
- Check Engine Light illuminated on the dashboard.
- Limited power output or fail-safe mode engaged.
How to Fix P1220 GMC
- Begin by conducting a thorough inspection of the Throttle Position Sensor 2 and its wiring harness for any visible damage or corrosion.
- Test the TPS 2 using a multimeter to determine if it is functioning within the specified parameters.
- If the sensor is faulty, replace it with a new OEM or quality aftermarket part.
- Clear the DTC from the ECM using a diagnostic scanner and test the vehicle to ensure the issue has been resolved.
- If the problem persists, further diagnosis may be required to identify any underlying ECM or wiring issues.
Cost to Fix P1220 GMC
The cost of repairing a P1220 DTC related to the Throttle Position Sensor 2 Circuit can vary depending on the specific cause of the issue and the labor rates in your area. Generally, replacing a faulty TPS 2 sensor can cost between $50 and $200, with additional costs for diagnostic time and labor. Overall, the total repair cost for this issue may range from $100 to $500, depending on the extent of the problem and the components that need to be replaced. It is recommended to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on your vehicle's make and model, as well as local labor rates.
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