AutoCodes – Chevrolet – P2555 Chevrolet

P2555 Chevrolet 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 Chevrolet 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 200

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC P2555 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 P2555 Chevrolet code?

Need more information on how to fix the P2555 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2555 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 Chevrolet Code

1. What does the OBD-II code P2555 mean for a Chevrolet?

Code P2555 indicates a high voltage issue in the throttle actuator control inhibit circuit, which may affect the electronic throttle system's operation.

2. What are the common symptoms of code P2555 in a Chevrolet?

Symptoms may include reduced engine performance, poor throttle response, difficulty accelerating, and the Check Engine Light being illuminated.

3. What causes the P2555 code on a Chevrolet?

Common causes include faulty wiring or connectors in the throttle actuator circuit, a failing throttle actuator control module, or issues with the vehicle's power supply.

4. Can I drive my Chevrolet with the P2555 code?

Driving with this code is not recommended, as it may lead to reduced throttle control and unsafe driving conditions.

5. How is the P2555 code diagnosed?

A technician will inspect the wiring and connectors, test the throttle actuator control module, and use a scan tool to monitor voltage levels in the circuit.

6. How do I fix the P2555 code on a Chevrolet?

Repairs may involve replacing damaged wiring, connectors, or the throttle actuator control module, and ensuring proper voltage supply to the circuit.

7. Could a weak battery cause the P2555 code?

Yes, a weak or failing battery can cause voltage irregularities that may trigger this code.

8. Can a dirty throttle body cause the P2555 code?

While a dirty throttle body is less likely to cause this specific code, cleaning it is still a good maintenance step to rule out related issues.

9. How much does it cost to fix the P2555 code on a Chevrolet?

Repair costs can vary widely depending on the issue but may range from $100 to $500, including diagnostics and parts replacement.

10. Do I need to reprogram the throttle actuator after fixing the P2555 code?

In some cases, reprogramming or resetting the throttle actuator module may be necessary after repairs to ensure proper operation.

Discuss the causes and fixes for P2555 Chevrolet OBDII Code

Submit a New Comment

Code P2555 Chevrolet comments

No comments found for this page.

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.