AutoCodes – GMC – P2555 GMC

P2555 GMC Code - Throttle Actuator Control Inhibit Circuit High Voltage

Quick Answer

The Powertrain Control Module (PCM) receives Accelerator Pedal Position (APP) sensor information and calculates the desired throttle position. Common causes include Faulty Throttle Control Actuator (TAC) module (part of the Throttle Body Assembly), Throttle Control Actuator Module harness is open or shorted, Throttle Control Actuator Module 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: P2555 GMC indicates Throttle Actuator Control Inhibit Circuit High Voltage.
Common causes: Common causes include Faulty Throttle Control Actuator (TAC) module (part of the Throttle Body Assembly), Throttle Control Actuator Module harness is open or shorted, Throttle Control Actuator Module 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 223

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 13, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P2555 GMC Description

The Powertrain Control Module (PCM) receives Accelerator Pedal Position (APP) sensor information and calculates the desired throttle position. The PCM sends this desired throttle position or target value to the Throttle Control Actuator (TAC) module. The TAC module achieves the desired throttle position by commanding the throttle control motor to position the throttle valve at the target value. The TAC module then compares the throttle position (TP) sensor 1 value to the target value. If necessary, the throttle control motor is moved slightly in order to obtain the exact target value position. If the TAC motor control circuit voltage is too high, DTC P2555 sets. The TAC motor and circuitry are integral parts of the TAC module and are not serviced separately. The TAC module is not serviceable and must be replaced with the throttle body assembly.

OBDII Code P2555 GMC - Throttle Actuator Control Inhibit Circuit High Voltage - AutoCodes.com — P2555 GMC Code - Throttle Actuator Control Inhibit Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2555 GMC?

Faulty Throttle Control Actuator (TAC) module (part of the Throttle Body Assembly)
Throttle Control Actuator Module harness is open or shorted
Throttle Control Actuator Module circuit poor electrical connection

How to Fix the DTC P2555 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 does this mean?

Code Tech Notes

The Throttle Control Actuator (TAC) module is part of the Throttle Body Assembly and is not serviceable. The Throttle Body Assembly needs to be replaced to fix the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2555 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.

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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 P2555 GMC Code

1. What are the common symptoms of OBDII code P2555 GMC (Throttle Actuator Control Inhibit Circuit High Voltage)?

The common symptoms of P2555 include reduced engine power, illuminated Check Engine Light (CEL), and potential difficulty accelerating.

2. What could cause OBDII code P2555 (Throttle Actuator Control Inhibit Circuit High Voltage) in a GMC vehicle?

Possible causes of P2555 can include a faulty throttle actuator control module, damaged wiring or connectors in the throttle actuator circuit, or a problem with the throttle body itself.

3. How serious is OBDII code P2555 GMC (Throttle Actuator Control Inhibit Circuit High Voltage)?

P2555 should be addressed promptly as it can affect the performance and drivability of the vehicle. Continuing to drive with this code present may lead to further damage or safety issues.

4. Can I continue driving my GMC with OBDII code P2555 present?

It is not recommended to drive your vehicle with P2555 active, as it may result in reduced engine power and potentially unsafe driving conditions. It is best to address the issue as soon as possible.

5. How can I diagnose and repair OBDII code P2555 (Throttle Actuator Control Inhibit Circuit High Voltage) in my GMC?

Diagnosing P2555 typically involves using a scan tool to retrieve the code and then inspecting the throttle actuator components, wiring, and connectors for any visible damage. Repair may involve replacing faulty components or repairing damaged wiring.

6. Is it possible to reset OBDII code P2555 in a GMC without fixing the underlying issue?

While you can clear the code using an OBDII scanner, it is not recommended to do so without addressing the root cause. The code is likely to reappear if the underlying problem is not fixed.

7. How much does it cost to repair OBDII code P2555 in a GMC vehicle?

The cost of repairing P2555 can vary depending on the specific issue causing the code, the labor rates of the repair shop, and the cost of any replacement parts needed. It is recommended to get a diagnosis and estimate from a qualified mechanic.

8. Can a DIY enthusiast fix OBDII code P2555 in a GMC at home?

Diagnosing and repairing P2555 may require specialized tools and knowledge, so it is recommended to consult a professional mechanic. However, if you have experience with automotive repairs and the necessary tools, you may be able to address the issue at home.

9. Will OBDII code P2555 (Throttle Actuator Control Inhibit Circuit High Voltage) cause permanent damage to my GMC if left unresolved?

Leaving P2555 unresolved can potentially lead to further issues with the throttle system and may result in more severe damage over time. It is best to address the code promptly to prevent any long-term damage.

10. How long does it typically take to repair OBDII code P2555 in a GMC?

The repair time for P2555 can vary depending on the exact cause of the code and the availability of parts. In some cases, the repair may be completed within a few hours, while more complex issues may take longer to diagnose and fix.