AutoCodes – Buick – P2090 Buick

P2090 Buick Code - Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 1

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 Exhaust Camshaft Position Actuator Solenoid Valve Bank 1, Exhaust Camshaft Position Actuator Solenoid Valve Bank 1 harness is open or shorted, Exhaust Camshaft Position Actuator Solenoid Valve Bank 1 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: P2090 Buick indicates Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 1.
Common causes: Common causes include Faulty Exhaust Camshaft Position Actuator Solenoid Valve Bank 1, Exhaust Camshaft Position Actuator Solenoid Valve Bank 1 harness is open or shorted, Exhaust Camshaft Position Actuator Solenoid Valve Bank 1 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 925

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 Dec 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2090 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 Valve signal from the ECM is Pulse Width Modulated (PWM). The ECM controls the Camshaft Position Actuator Solenoid Valve duty cycle by controlling the amount of solenoid valve ON time. The Camshaft Position Actuator Solenoid Valve controls the advance or the retard of each camshaft. The Camshaft Position Actuator Solenoid Valve controls the oil flow that applies the pressure to advance or retard the camshafts.
Ignition voltage is supplied directly to the Camshaft Position Actuator Solenoid Valve. The ECM controls the solenoid valve by grounding the control circuit with a solid-state device called a driver. The driver is equipped with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.
The Diagnostic Trouble Code (DTC) will set when the ECM detects a short to ground in the CMP actuator solenoid circuits for greater than 1 second or a cumulative of 5 seconds, when the solenoid is commanded OFF.

OBDII Code P2090 Buick - Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 1 - AutoCodes.com — P2090 Buick Code - Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 1

What does this mean?

What are the Possible Causes of the DTC P2090 Buick?

Faulty Exhaust Camshaft Position Actuator Solenoid Valve Bank 1
Exhaust Camshaft Position Actuator Solenoid Valve Bank 1 harness is open or shorted
Exhaust Camshaft Position Actuator Solenoid Valve Bank 1 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2090 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 P2090 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.

Need more information about the P2090 Buick code?

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Need Help with the 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 P2090 Buick Code

1. What are common symptoms of OBDII code P2090 in a Buick related to the Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 1?

- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and the illumination of the check engine light.

2. What are the possible causes of the OBDII code P2090 in a Buick?

- Potential causes include a faulty camshaft position actuator solenoid valve, damaged wiring or connectors in the control circuit, low engine oil levels, or issues with the engine control module.

3. How can I diagnose the Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 1 issue in my Buick?

- Diagnosing this problem typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the wiring and connectors for damage, testing the solenoid valve for proper operation, and checking the engine oil levels.

4. Can I drive my Buick with the P2090 code present?

- It is not recommended to drive your Buick with the P2090 code present, as it can lead to further engine damage and decreased performance. It is best to address the issue promptly.

5. How is the Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 1 problem repaired in a Buick?

- The repair process may involve replacing the faulty camshaft position actuator solenoid valve, repairing or replacing damaged wiring or connectors, ensuring proper engine oil levels, and clearing the fault code from the engine control module.

6. Is it possible to prevent the OBDII code P2090 from occurring in my Buick?

- To prevent this issue, it is important to follow the manufacturer's recommended maintenance schedule, regularly check and maintain proper engine oil levels, and address any engine performance issues promptly.

7. How much does it typically cost to repair the P2090 code in a Buick?

- The cost of repairing the Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 1 issue can vary depending on the specific cause of the problem, but it may range from $200 to $500 or more.

8. Can a DIY enthusiast fix the P2090 code in a Buick?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address the OBDII code P2090 by following repair guides and using proper diagnostic equipment. However, professional help is recommended for complex issues.

9. Will resetting the check engine light resolve the P2090 code in a Buick?

- Simply resetting the check engine light will not fix the underlying issue causing the P2090 code. It is crucial to diagnose the problem, address the root cause, and clear the fault code properly for a lasting repair.

10. How long does it take to repair the Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 1 problem in a Buick?

- The repair time for the P2090 code can vary based on the exact cause of the issue, the availability of parts, and the repair shop's workload. In general, it may take a few hours to a full day to complete the repair.