P0122 2014 GMC Sierra Code - Throttle Position Sensor 1 Circuit Low Voltage
Quick Answer
The P0122 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the Throttle Position Sensor 1 Circuit, specifically low voltage. Common causes include Corroded or damaged wiring connecting the TPS to the ECM, Faulty throttle position sensor, 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
- P0122 2014 GMC Sierra indicates Throttle Position Sensor 1 Circuit Low Voltage.
- Common causes
- Common causes include Corroded or damaged wiring connecting the TPS to the ECM, Faulty throttle position sensor, 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 P0122 2014 GMC Sierra Description
The P0122 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the Throttle Position Sensor 1 Circuit, specifically low voltage. The throttle position sensor (TPS) is a crucial component of the vehicle's electronic throttle control system, responsible for monitoring the position of the throttle pedal and sending this information to the engine control module (ECM). The ECM uses this data to adjust fuel delivery and ignition timing, ensuring optimal engine performance and efficiency.
Common Causes of P0122 2014 GMC Sierra
- Corroded or damaged wiring connecting the TPS to the ECM.
- Faulty throttle position sensor.
- ECM malfunction.
- Loose or poor connections at the TPS.
- Environmental factors such as moisture or debris affecting the sensor's performance.
Symptoms of P0122 2014 GMC Sierra
- Poor acceleration or hesitation when pressing the throttle pedal.
- Rough idling or stalling when at a stop.
- Decreased fuel efficiency.
- Illumination of the Check Engine Light on the dashboard.
- Limp mode activation, limiting the vehicle's speed and performance.
How to Fix P0122 2014 GMC Sierra
- Begin by diagnosing the issue using a scan tool to confirm the P0122 code and identify the specific cause.
- Inspect the wiring harness for any signs of damage, corrosion, or loose connections. Repair or replace as necessary.
- Test the throttle position sensor using a multimeter to check for proper voltage output. Replace the sensor if it fails the test.
- Check the ECM for any faults or malfunctions that may be causing the low voltage reading. Replace or reprogram the ECM if needed.
- Clear the DTC and perform a test drive to ensure the issue has been resolved.
Cost to Fix P0122 2014 GMC Sierra
The typical repair costs for addressing a P0122 code on a 2014 GMC Sierra can range from $100 to $300, depending on the specific cause of the issue and the cost of parts. This estimate includes the price of a new throttle position sensor, wiring repairs, and labor costs. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Additionally, rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more affordable pricing.
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