AutoCodes – GMC – P2091 GMC

P2091 GMC Code - Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High 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: P2091 GMC indicates Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,037

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P2091 GMC 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 voltage in the CMP actuator solenoid circuits for greater than 1 second or a cumulative of 5 seconds, when the solenoid is commanded ON.

OBDII Code P2091 GMC - Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Bank 1 - AutoCodes.com — P2091 GMC Code - Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Bank 1

What does this mean?

What are the Possible Causes of the DTC P2091 GMC?

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 P2091 GMC?

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 P2091 GMC 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 P2091 GMC code?

Need more information on how to fix the P2091 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2091 GMC 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 P2091 GMC Code

1. What are the common symptoms of OBDII code P2091 in a GMC vehicle?

- Common symptoms of code P2091 include rough idling, poor engine performance, decreased fuel efficiency, and illuminated check engine light.

2. What causes the Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Bank 1 code in a GMC?

- The P2091 code in a GMC is often caused by a faulty camshaft position actuator solenoid, wiring issues, or a malfunctioning engine control module (ECM).

3. How serious is the P2091 OBDII code in a GMC vehicle?

- While the P2091 code may not cause immediate drivability issues, it can lead to long-term engine damage if left unresolved. It is recommended to address the issue promptly.

4. Can I continue driving my GMC with the P2091 code present?

- It is not recommended to continue driving your GMC with the P2091 code present, as it can lead to poor engine performance and potential damage over time. It is best to address the issue as soon as possible.

5. How can I diagnose the P2091 code in my GMC?

- Diagnosing the P2091 code requires using an OBDII scanner to retrieve the fault code, inspecting the camshaft position actuator solenoid and its wiring for any visible damage, and testing the circuit for proper voltage.

6. Is it possible to repair the P2091 code in my GMC myself?

- Depending on your mechanical expertise, you may be able to repair the P2091 code yourself by replacing the faulty camshaft position actuator solenoid or repairing any damaged wiring. However, professional help is recommended for accurate diagnosis and repair.

7. How much does it typically cost to repair the P2091 code in a GMC?

- The cost of repairing the P2091 code in a GMC can vary depending on the extent of the issue, parts needed, and labor costs. On average, expect to pay anywhere from $200 to $500 for parts and labor.

8. Will resetting the check engine light resolve the P2091 code in my GMC?

- Simply resetting the check engine light will not resolve the underlying issue causing the P2091 code. It is important to diagnose and repair the root cause of the problem to prevent it from recurring.

9. Can a dirty engine oil or filter cause the P2091 code in a GMC?

- While dirty engine oil or filter can contribute to engine performance issues, they are not direct causes of the P2091 code. Focus on diagnosing the camshaft position actuator solenoid and related components for this specific code.

10. How long does it take to repair the P2091 code in a GMC at a professional auto repair shop?

- Repairing the P2091 code in a GMC at a professional auto repair shop typically takes a few hours, depending on the extent of the issue and availability of parts. It is best to consult with the mechanic for a more accurate time estimate.