AutoCodes – Saturn – P2555 Saturn

P2555 Saturn 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 Saturn 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 226

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

What does this mean?

What are the Possible Causes of the DTC P2555 Saturn?

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 Saturn?

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 Saturn 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 Saturn 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 P2555 Saturn Code

1. What does the OBDII code P2555 mean on a Saturn?

P2555 indicates "Throttle Actuator Control Inhibit Circuit High Voltage," meaning the engine control module (ECM) detected an abnormally high voltage in the throttle actuator control inhibit circuit.

2. What are the common symptoms of P2555 on a Saturn?

Common symptoms include reduced engine power, poor throttle response, an illuminated check engine light, and potential activation of "limp mode."

3. What causes the P2555 code to trigger?

Common causes include a faulty throttle actuator, damaged wiring or connectors in the circuit, a malfunctioning ECM, or a short to voltage in the throttle control system.

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

Driving with the P2555 code is not recommended, as it may lead to reduced performance, unsafe driving conditions, or further damage to the throttle system.

5. How do I diagnose the P2555 code on my Saturn?

Diagnosis involves checking for damaged or corroded wiring, testing the throttle actuator for proper operation, and verifying ECM functionality with a multimeter or scan tool.

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

Repairs may include replacing a faulty throttle actuator, repairing or replacing damaged wiring, cleaning or reconnecting electrical connections, or reprogramming or replacing the ECM.

7. What tools are needed to diagnose and repair the P2555 code?

Youâ€™ll need an OBDII scanner, a multimeter to test voltage and continuity, and basic hand tools for inspecting and repairing wiring or connectors.

8. Can the P2555 code be caused by a dead battery?

A weak or dead battery is unlikely to cause this code directly, but low voltage issues during startup could occasionally affect throttle control circuits.

9. Will clearing the P2555 code fix the issue?

Clearing the code will remove the check engine light temporarily, but the underlying problem must be resolved to prevent the code from returning.

10. How much does it cost to repair the P2555 code on a Saturn?

Repair costs can vary widely, ranging from $50-$200 for wiring repairs to $300-$1000 for throttle actuator or ECM replacement, depending on labor and parts.