AutoCodes – Buick – P00C1 Buick

P00C1 Buick Code - Turbocharger Bypass Solenoid Valve Control Circuit Low Voltage Bank 2

Quick Answer

Each of the turbochargers is provided with a vacuum-operated bypass valve, which opens during abruptly closed throttle conditions, to prevent turbocharger surging and damage from vibrations. Common causes include Faulty Turbocharger Bypass Solenoid Valve, Turbocharger Bypass Solenoid Valve harness is open or shorted, Turbocharger Bypass Solenoid Valve 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: P00C1 Buick indicates Turbocharger Bypass Solenoid Valve Control Circuit Low Voltage Bank 2.
Common causes: Common causes include Faulty Turbocharger Bypass Solenoid Valve, Turbocharger Bypass Solenoid Valve harness is open or shorted, Turbocharger Bypass Solenoid Valve 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 168

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jul 03, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P00C1 Buick Description

Each of the turbochargers is provided with a vacuum-operated bypass valve, which opens during abruptly closed throttle conditions, to prevent turbocharger surging and damage from vibrations. The bypass valve vacuum source is provided by a vacuum pump which is driven off the end of the right-hand exhaust camshaft. The valves are controlled by the Engine Control Module (ECM), by utilizing remotely mounted solenoid valves. When the valves open during closed throttle deceleration conditions, the air is allowed to recirculate in the turbochargers to maintain turbocharger speed. Within a calibrated range during a closed throttle event, or upon a wide-open throttle command the valves close to optimize turbo response.
As engine load and engine speed increase, the turbocharger bypass solenoid valves are commanded ON by the ECM. As soon as the throttle closes the turbocharger bypass solenoid valves are commanded OFF by the ECM to allow the bypass valves to open and allow the turbocharger air to recirculate to prevent surging.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects a short to ground on the turbocharger bypass solenoid valve control circuit bank 2 for greater than 6 s.

OBDII Code P00C1 Buick - Turbocharger Bypass Solenoid Valve Control Circuit Low Voltage Bank 2 - AutoCodes.com — P00C1 Buick Code - Turbocharger Bypass Solenoid Valve Control Circuit Low Voltage Bank 2

What does this mean?

What are the Possible Causes of the DTC P00C1 Buick?

Faulty Turbocharger Bypass Solenoid Valve
Turbocharger Bypass Solenoid Valve harness is open or shorted
Turbocharger Bypass Solenoid Valve circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P00C1 Buick?

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 P00C1 Buick 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.