P0123 GMC 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 GMC 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.
Code P0123 GMC Description
What are the Possible Causes of the DTC P0123 GMC?
- 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 GMC?
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0123 GMC 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 GMC code?
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Information for Specific GMC Models
- P0123 2014 GMC Sierra — Throttle Position Sensor Circuit High Voltage
- P0123 2015 GMC Sierra — Throttle Position Sensor Circuit High Voltage
- P0123 2016 GMC Sierra — Throttle Position Sensor Circuit High Voltage
- P0123 2017 GMC Sierra — Throttle Position Sensor Circuit High Voltage
- P0123 2018 GMC Sierra — Throttle Position Sensor Circuit High Voltage
Frequently Asked Questions about P0123 GMC Code
1. What are the common symptoms of OBDII code P0123 in a GMC related to the throttle position sensor?
When the throttle position sensor circuit shows high voltage, you may experience issues like poor fuel economy, rough idling, stalling, or a lack of response from the accelerator pedal.
2. What are the typical causes of OBDII code P0123 in a GMC?
The throttle position sensor circuit high voltage code P0123 in a GMC is often caused by a faulty throttle position sensor, damaged wiring or connectors, or issues with the engine control module.
3. How can I diagnose the throttle position sensor in my GMC if I suspect it is causing OBDII code P0123?
To diagnose the throttle position sensor, you can use a multimeter to test its voltage output, check for any signs of physical damage, and inspect the wiring and connectors for any corrosion or loose connections.
4. Can a dirty throttle body or air filter cause OBDII code P0123 in a GMC?
Yes, a dirty throttle body or clogged air filter can disrupt the proper functioning of the throttle position sensor, leading to erroneous high voltage readings and triggering code P0123.
5. What are some repair tips for resolving OBDII code P0123 related to the throttle position sensor in a GMC?
When dealing with code P0123, start by inspecting and cleaning the throttle body, checking for any loose connections or damaged wiring, and if needed, replacing the throttle position sensor.
6. Is it safe to continue driving my GMC with OBDII code P0123 related to the throttle position sensor circuit high voltage?
It is not recommended to drive your GMC with OBDII code P0123, as it can lead to poor engine performance, reduced fuel efficiency, and potential safety hazards. It's best to address the issue promptly.
7. Can resetting the OBDII code P0123 in my GMC temporarily fix the issue with the throttle position sensor?
Resetting the OBDII code P0123 may temporarily clear the error code, but if the underlying issue with the throttle position sensor circuit high voltage is not addressed, the code is likely to reappear.
8. How much does it typically cost to repair OBDII code P0123 related to the throttle position sensor in a GMC?
The cost of repairing OBDII code P0123 in a GMC can vary depending on the cause of the issue. Replacing a faulty throttle position sensor may cost around $100 to $200, while addressing wiring or connector problems could be more expensive.
9. Can a DIY enthusiast with basic car repair skills fix OBDII code P0123 related to the throttle position sensor in a GMC?
Yes, if you have basic car repair skills and the necessary tools, you may be able to replace the throttle position sensor or address wiring issues causing OBDII code P0123 in your GMC. However, if you are unsure, it's best to consult a professional mechanic.
10. How can regular maintenance help prevent OBDII code P0123 related to the throttle position sensor in a GMC?
Regularly inspecting and cleaning the throttle body, ensuring the air filter is clean, and checking for any signs of wear or damage in the throttle position sensor circuit can help prevent issues that lead to code P0123 in your GMC.
Discuss the causes and fixes for P0123 GMC OBDII Code
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Is it possible that the codes are link to the recall from GM with engine coolant and fire risk because my car has been part of the recall for as long as my car as been made 02 Buick regal saftey recall my car was "fixed from my. Dealership " but my car beauty cover caught on fire which should have been removed and they will not help me now my car reading both codes p0123. P0306
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Unfortunately, as far as I know, neither of the codes are related to the recall you mention.
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