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P0123 2015 Chevrolet Silverado Code - Throttle Position Sensor Circuit High Voltage

Quick Answer

The P0123 code for a 2015 Chevrolet Silverado indicates a problem with the Throttle Position Sensor (TPS) circuit registering high voltage. Common causes include Faulty Throttle Position Sensor, Corroded or damaged TPS wiring or connectors, 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
P0123 2015 Chevrolet Silverado indicates Throttle Position Sensor Circuit High Voltage.
Common causes
Common causes include Faulty Throttle Position Sensor, Corroded or damaged TPS wiring or connectors, 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P0123 2015 Chevrolet Silverado Description

The P0123 code for a 2015 Chevrolet Silverado indicates a problem with the Throttle Position Sensor (TPS) circuit registering high voltage. The 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 then uses this data to adjust fuel delivery and ignition timing for optimal engine performance.

OBDII Code P0123 2015 Chevrolet Silverado - Throttle Position Sensor Circuit High Voltage
P0123 2015 Chevrolet Silverado Code - Throttle Position Sensor Circuit High Voltage

Common Causes of P0123 2015 Chevrolet Silverado

  1. Faulty Throttle Position Sensor
  2. Corroded or damaged TPS wiring or connectors
  3. ECM malfunction
  4. Poor electrical connections in the TPS circuit
  5. Carbon buildup on the throttle body affecting TPS readings

Symptoms of P0123 2015 Chevrolet Silverado

  1. Check Engine Light illuminated on the dashboard
  2. Rough idling or stalling at low speeds
  3. Decreased fuel efficiency
  4. Delayed or hesitant acceleration
  5. Harsh shifts in automatic transmission vehicles

How to Fix P0123 2015 Chevrolet Silverado

  1. Use an OBD-II scanner to read and record the fault code.
  2. Inspect the TPS wiring and connectors for any damage or corrosion.
  3. Test the TPS sensor using a multimeter to check for proper voltage readings.
  4. Replace the TPS sensor if it is found to be faulty.
  5. Clear the fault code from the ECM's memory and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0123 2015 Chevrolet Silverado

The cost of repairing a high voltage TPS circuit on a 2015 Chevrolet Silverado can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the cost of a new Throttle Position Sensor can range from $50 to $150, while the labor cost for diagnosis and repair can range from $100 to $300. Overall, the total repair cost could be anywhere from $150 to $450. It's important to note that these are rough estimates, and actual costs may differ based on location and the repair shop's rates.

What does this mean?

Tech Notes for P0123 2015 Chevrolet Silverado





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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0123 2015 Chevrolet Silverado Code

1. What does the OBDII code P0123 mean on a 2015 Chevrolet Silverado?

P0123 indicates a "Throttle Position Sensor (TPS) Circuit High Voltage," meaning the engine control module (ECM) is detecting a voltage signal from the TPS that is higher than expected.

2. What are the common symptoms of code P0123 on a 2015 Chevrolet Silverado?

Symptoms may include poor acceleration, rough idling, engine hesitation, sudden surging, reduced power mode (limp mode), or an illuminated check engine light.

3. What causes the P0123 code in a 2015 Chevrolet Silverado?

Common causes include a faulty throttle position sensor, damaged wiring or connectors in the TPS circuit, a stuck throttle body, or issues with the ECM.

4. Can I drive my 2015 Chevrolet Silverado with the P0123 code?

While the truck may still be drivable, it could enter reduced power mode or experience performance issues. Driving for an extended period without addressing the issue could cause further damage.

5. How do I diagnose the P0123 code on a 2015 Chevrolet Silverado?

Start by inspecting the TPS wiring and connectors for damage or corrosion. Use a multimeter to test the TPS voltage output. If no wiring issues are found, the sensor or ECM may require further testing.

6. How is the P0123 code repaired on a 2015 Chevrolet Silverado?

Repairs may involve replacing the throttle position sensor, repairing damaged wiring, cleaning the throttle body, or reprogramming or replacing the ECM if necessary.

7. What tools do I need to fix a P0123 code on a 2015 Chevrolet Silverado?

You’ll need a scan tool or OBDII scanner, a multimeter for electrical testing, and basic tools to access and replace the throttle position sensor or wiring.

8. How much does it cost to fix the P0123 code on a 2015 Chevrolet Silverado?

The cost varies depending on the repair. Replacing a throttle position sensor typically costs $100-$300, including parts and labor, while more extensive wiring or ECM repairs may cost more.

9. Can a dirty throttle body cause the P0123 code in a 2015 Chevrolet Silverado?

Yes, a dirty or sticking throttle body can cause erratic voltage readings, leading to a P0123 code. Cleaning the throttle body may resolve the issue.

10. Will clearing the code fix P0123 on a 2015 Chevrolet Silverado?

Clearing the code may temporarily reset the check engine light, but it won’t solve the underlying issue. Proper diagnosis and repair are required to prevent the code from returning.

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