P0123 2016 GMC Sierra Code - Throttle Position Sensor Circuit High Voltage
Quick Answer
The P0123 code for a 2016 GMC Sierra indicates that there is a high voltage condition in the throttle position sensor (TPS) circuit. Common causes include Faulty TPS sensor, Short or open circuit in TPS wiring, Corroded or damaged connector. 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 GMC Sierra indicates Throttle Position Sensor Circuit High Voltage.
- Common causes
- Common causes include Faulty TPS sensor, Short or open circuit in TPS wiring, Corroded or damaged connector.
- 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 P0123 2016 GMC Sierra Description
The P0123 code for a 2016 GMC Sierra indicates that there is a high voltage condition in the throttle position sensor (TPS) circuit. The TPS is a crucial component of the vehicle's fuel management system, as it communicates the position of the throttle to the engine control module (ECM). The ECM uses this information to determine the appropriate fuel delivery and ignition timing for optimal engine performance.
Common Causes of P0123 2016 GMC Sierra
- Faulty TPS sensor
- Short or open circuit in TPS wiring
- Corroded or damaged connector
- ECM malfunction
Symptoms of P0123 2016 GMC Sierra
- Poor fuel efficiency
- Rough idling
- Hesitation or stalling
- Engine misfires
- Limp mode activation
How to Fix P0123 2016 GMC Sierra
- Begin by diagnosing the specific cause of the high voltage condition using a diagnostic scanner to read the code and perform voltage tests on the TPS circuit.
- Inspect the TPS sensor for any signs of damage or wear, and replace it if necessary.
- Check the wiring and connectors in the TPS circuit for any shorts, opens, or corrosion, and repair or replace them as needed.
- Clear the diagnostic trouble codes from the ECM and perform a test drive to ensure that the issue has been resolved.
- If the problem persists, further diagnostics may be required to pinpoint the root cause of the high voltage condition.
Cost to Fix P0123 2016 GMC Sierra
The typical repair costs for addressing a P0123 code in a 2016 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacing a faulty TPS sensor can cost between $50 and $200, while addressing wiring or connector issues may range from $100 to $300. Labor costs at auto repair shops typically range from $80 to $150 per hour. It's advisable to consult with a professional mechanic for a more accurate estimate based on the specific circumstances of your vehicle.
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Frequently Asked Questions about P0123 2016 GMC Sierra Code
1. What does the OBDII code P0123 mean on a 2016 GMC Sierra?
P0123 indicates that the throttle position sensor (TPS) circuit has detected a high voltage input, which is outside the expected range.
2. What are the common symptoms of P0123 in a 2016 GMC Sierra?
Symptoms include poor acceleration, rough idling, reduced engine performance, an illuminated check engine light, and possible activation of "limp mode."
3. What causes the P0123 code on a 2016 GMC Sierra?
Common causes include a faulty throttle position sensor, damaged wiring or connectors, corroded electrical connections, or a malfunctioning engine control module (ECM).
4. Can I drive my 2016 GMC Sierra with the P0123 code?
It’s not recommended to drive with this code for an extended period, as it can lead to poor engine performance, safety issues, and potential damage to other components.
5. How do I diagnose the P0123 code on my 2016 GMC Sierra?
Check the TPS and its wiring for damage or corrosion, test the sensor with a multimeter, and use a scan tool to monitor live TPS data for irregularities.
6. How do I fix the P0123 code on a 2016 GMC Sierra?
Repairs may include replacing the throttle position sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming the ECM if needed.
7. How much does it cost to repair the P0123 code on a 2016 GMC Sierra?
The repair cost varies but typically ranges from $100 to $300, depending on whether the TPS, wiring, or connectors need replacement.
8. Can a dirty throttle body cause the P0123 code in a 2016 GMC Sierra?
A dirty throttle body usually causes different codes, but excessive carbon buildup could potentially interfere with the TPS operation.
9. Do I need to reset the ECM after fixing the P0123 code on my 2016 GMC Sierra?
Yes, after repairs, clear the code with an OBDII scan tool and test-drive the vehicle to ensure the issue is resolved.
10. Can a low battery cause the P0123 code on a 2016 GMC Sierra?
A weak or failing battery is unlikely to cause this specific code but can lead to other electrical issues that might indirectly affect the TPS circuit.
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