AutoCodes – Mercedes-Benz – P2090 Mercedes-Benz

P2090 Mercedes-Benz Code - 'B' Camshaft Position Actuator Control Circuit Low Bank 1

Quick Answer

This fault code is stored in the Engine Control Module (ECM) when a malfunction is detected in the continuously variable valve timing system. Common causes include Faulty Continuously Variable Valve Timing Solenoid, Continuously Variable Valve Timing Solenoid harness is open or shorted, Continuously Variable Valve Timing Solenoid 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 Mercedes-Benz indicates 'B' Camshaft Position Actuator Control Circuit Low Bank 1.
Common causes: Common causes include Faulty Continuously Variable Valve Timing Solenoid, Continuously Variable Valve Timing Solenoid harness is open or shorted, Continuously Variable Valve Timing Solenoid 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 9,396

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 Jul 09, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P2090 Mercedes-Benz Description

This fault code is stored in the Engine Control Module (ECM) when a malfunction is detected in the continuously variable valve timing system. Mechanical defects such as incorrect valve timing or low oil level/pressure can cause a fault code to be stored. Mechanical issues should be ruled out before carrying out an further diagnostic tests.

OBDII Code P2090 Mercedes-Benz - 'B' Camshaft Position Actuator Control Circuit Low Bank 1 - AutoCodes.com — P2090 Mercedes-Benz Code - 'B' Camshaft Position Actuator Control Circuit Low Bank 1

What does this mean?

What are the Possible Causes of the DTC P2090 Mercedes-Benz?

Faulty Continuously Variable Valve Timing Solenoid
Continuously Variable Valve Timing Solenoid harness is open or shorted
Continuously Variable Valve Timing Solenoid circuit poor electrical connection

How to Fix the DTC P2090 Mercedes-Benz?

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

Mercedes Benz Code = 0066 (Right camshaft exhaust solenoid) has a short circuit to ground. (P2090)
Mercedes Benz Code = 0070 (Left camshaft exhaust solenoid) has a short circuit to ground. (P2090)

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2090 Mercedes-Benz 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 Mercedes-Benz code?

Need more information on how to fix the P2090 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2090 Mercedes-Benz 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 P2090 Mercedes-Benz Code

1. What are common symptoms of OBDII code P2090 in a Mercedes-Benz?

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

2. What does the "B" Camshaft Position Actuator Control Circuit Low Bank 1 mean in a Mercedes-Benz?

- This code indicates that there is a low voltage condition in the control circuit of the "B" camshaft position actuator in Bank 1 of the engine.

3. What are some possible causes of OBDII code P2090 in a Mercedes-Benz?

- Possible causes include a faulty camshaft position actuator, wiring issues, poor electrical connections, or a malfunctioning engine control module.

4. How can I diagnose the cause of OBDII code P2090 in my Mercedes-Benz?

- Diagnosing the issue typically involves checking the camshaft position actuator, inspecting the wiring and connections, and using a diagnostic tool to analyze the system.

5. Can I continue driving my Mercedes-Benz with OBDII code P2090?

- It is not recommended to continue driving with this code present, as it can lead to further engine damage and decreased performance.

6. Is it safe to clear the OBDII code P2090 in my Mercedes-Benz and see if it returns?

- Clearing the code may temporarily turn off the check engine light, but it is important to diagnose and address the underlying issue to prevent future problems.

7. How expensive is it to repair OBDII code P2090 in a Mercedes-Benz?

- The cost of repair can vary depending on the root cause of the issue, but it may involve replacing the camshaft position actuator or addressing wiring problems.

8. Can I fix OBDII code P2090 in my Mercedes-Benz myself?

- While some DIY enthusiasts may be able to address simpler causes like wiring issues, it is recommended to seek professional help for diagnosing and repairing this code.

9. What are the long-term effects of ignoring OBDII code P2090 in a Mercedes-Benz?

- Ignoring this code can lead to engine misfires, reduced fuel efficiency, and potential damage to other engine components over time.

10. How can I prevent OBDII code P2090 from occurring in my Mercedes-Benz in the future?

- Regular maintenance, such as checking and replacing faulty components, inspecting wiring, and keeping the engine control module in good condition, can help prevent this code from reoccurring.