AutoCodesChevrolet – P0123 2016 Chevrolet Silverado

P0123 2016 Chevrolet Silverado Code - Throttle Position Sensor Circuit High Voltage

Quick Answer

The Throttle Body Assembly contains a contact-less inductive throttle position sensing element that is managed by a customized integrated circuit. Common causes include Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body Assembly circuit poor electrical connection. 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 2016 Chevrolet Silverado indicates Throttle Position Sensor Circuit High Voltage.
Common causes
Common causes include Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body Assembly circuit poor electrical connection.
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 Popularity 337
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 20, 2022
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Code P0123 2016 Chevrolet Silverado Description

The Throttle Body Assembly contains a contact-less inductive throttle position sensing element that is managed by a customized integrated circuit. The throttle position sensor is mounted within the throttle body assembly and is not serviceable. The Engine Control Module (ECM) supplies the throttle body with a 5 V reference circuit, a low reference circuit. The asynchronous signal means communication is only going from the throttle body to the ECM. The throttle body cannot receive data from the ECM over the signal/serial data circuit. The throttle position sensor provides a signal voltage that changes relative to throttle blade angle. The throttle position sensor information is transmitted between the throttle body and the ECM on the signal/serial data circuit. The ECM decodes the serial data signal and is used as voltages for throttle position sensor 1 and 2. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the throttle position sensor 1 signal voltage is greater than 4.7 V for greater than 1 s.
OBDII Code P0123 2016 Chevrolet Silverado - Throttle Position Sensor Circuit High Voltage - AutoCodes.com
P0123 2016 Chevrolet Silverado Code - Throttle Position Sensor Circuit High Voltage

What are the Possible Causes of the DTC P0123 2016 Chevrolet Silverado?

  • Faulty Throttle Body Assembly
  • Throttle Body Assembly harness is open or shorted
  • Throttle Body Assembly circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P0123 2016 Chevrolet Silverado?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0123 2016 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0123 2016 Chevrolet Silverado code?

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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 2016 Chevrolet Silverado Code

What does OBDII code P0123 mean on a 2016 Chevrolet Silverado?

P0123 indicates that the Throttle Position Sensor (TPS) circuit is reporting a higher voltage than expected, suggesting a possible issue with the TPS or related components.

What are the common symptoms of code P0123 in a 2016 Chevrolet Silverado?

Symptoms may include poor acceleration, erratic idle, reduced engine performance, and the illumination of the Check Engine Light.

What causes code P0123 on a 2016 Chevrolet Silverado?

Common causes include a faulty throttle position sensor, damaged wiring or connectors in the TPS circuit, or a malfunctioning engine control module (ECM).

Can I drive my 2016 Chevrolet Silverado with code P0123?

It’s not recommended to drive the vehicle for extended periods with this code, as poor throttle response or reduced power could pose a safety risk.

How do you diagnose code P0123 in a 2016 Chevrolet Silverado?

Diagnosis involves using a scan tool to check TPS voltage readings, inspecting the sensor and its wiring for damage, and testing for proper ground and power at the TPS connector.

How is code P0123 fixed on a 2016 Chevrolet Silverado?

Repairs may include replacing the throttle position sensor, repairing damaged wiring or connectors, or reprogramming/replacing the ECM if necessary.

Is a throttle position sensor replacement expensive for a 2016 Chevrolet Silverado?

The cost can vary but typically ranges from $100 to $300, including parts and labor, depending on the repair shop and location.

Can a dirty throttle body cause code P0123 on a 2016 Chevrolet Silverado?

While less common, a dirty or sticking throttle body can sometimes cause abnormal sensor readings, which may trigger this code.

What tools are needed to troubleshoot code P0123 in a 2016 Chevrolet Silverado?

You’ll need an OBDII scan tool, a multimeter to check voltage and continuity, and possibly basic hand tools to access the TPS.

Can disconnecting the battery clear code P0123 on a 2016 Chevrolet Silverado?

Disconnecting the battery may temporarily clear the code, but it won’t resolve the underlying issue, and the code is likely to return.

Discuss the causes and fixes for P0123 2016 Chevrolet Silverado OBDII Code

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