AutoCodes – Buick – P0021 Buick

P0021 Buick Code - Intake Camshaft Position System Performance Bank 2

Quick Answer

The camshaft position actuator system enables the Engine Control Module (ECM) to change the timing of the camshafts while the engine is operating. Common causes include Faulty Camshaft Position Actuator Solenoid Valve, Camshaft Position Actuator Solenoid Valve harness is open or shorted, Camshaft Position Actuator 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: P0021 Buick indicates Intake Camshaft Position System Performance Bank 2.
Common causes: Common causes include Faulty Camshaft Position Actuator Solenoid Valve, Camshaft Position Actuator Solenoid Valve harness is open or shorted, Camshaft Position Actuator 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 1,578

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 08, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0021 Buick Description

The camshaft position actuator system enables the Engine Control Module (ECM) to change the timing of the camshafts while the engine is operating. The camshaft position actuator solenoid signal from the ECM is Pulse Width Modulated (PWM). The ECM controls the camshaft position actuator solenoid duty cycle by controlling the amount of solenoid ON time. The camshaft position actuator solenoid controls the advance or the retard of each camshaft. The camshaft position actuator solenoid controls the oil flow that applies the pressure to advance or retard the camshafts. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the difference between the desired and actual camshaft position angle is greater than 5° for greater than 2.5 s.

OBDII Code P0021 Buick - Intake Camshaft Position System Performance Bank 2 - AutoCodes.com — P0021 Buick Code - Intake Camshaft Position System Performance Bank 2

What does this mean?

What are the Possible Causes of the DTC P0021 Buick?

Faulty Camshaft Position Actuator Solenoid Valve
Camshaft Position Actuator Solenoid Valve harness is open or shorted
Camshaft Position Actuator Solenoid Valve circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0021 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 P0021 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.

Frequently Asked Questions about P0021 Buick Code

1. What are common symptoms of OBDII code P0021 in a Buick related to the Intake Camshaft Position System Performance Bank 2?

- Common symptoms include rough idling, engine misfires, decreased fuel efficiency, and potential stalling.

2. What are the possible causes of OBDII code P0021 in a Buick?

- Potential causes include a faulty camshaft position sensor, issues with the variable valve timing (VVT) system, engine oil flow problems, or a malfunctioning timing chain or belt.

3. How can I diagnose the OBDII code P0021 in my Buick?

- Diagnosis typically involves using a scan tool to read the code, inspecting the camshaft position sensor, checking oil levels and quality, and examining the VVT system components.

4. Can driving with the OBDII code P0021 in a Buick cause further damage?

- Continuing to drive with this code can potentially lead to engine damage, reduced performance, and higher repair costs if not addressed promptly.

5. What are some repair tips for fixing OBDII code P0021 in a Buick?

- Repair tips may include replacing the camshaft position sensor, addressing VVT system issues, ensuring proper engine oil levels and quality, and inspecting the timing chain or belt.

6. Is it safe to continue driving my Buick with the check engine light on due to OBDII code P0021?

- It is not recommended to drive the vehicle with the check engine light on, as unresolved issues related to this code can lead to further damage and potential safety risks.

7. How much does it typically cost to repair OBDII code P0021 in a Buick?

- Repair costs can vary depending on the specific cause of the code, but they may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can I reset the OBDII code P0021 in my Buick myself?

- While you can attempt to clear the code using an OBDII scanner, it is important to diagnose and address the underlying issue causing the code before resetting it.

9. Will OBDII code P0021 cause my Buick to fail an emissions test?

- Yes, this code can cause your Buick to fail an emissions test, as it indicates a problem with the camshaft position system, which can affect emissions control.

10. How urgent is it to address OBDII code P0021 in a Buick?

- It is recommended to address this code as soon as possible to prevent further damage to the engine and ensure optimal performance and fuel efficiency.