AutoCodes – Generic – P2091

P2091 Code - Exhaust Camshaft Position Actuator Solenoid Control Circuit High Voltage Bank 1

Quick Answer

The Camshaft Position (CMP) 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 Bank 1, Exhaust Camshaft Position Actuator Bank 1 Solenoid harness is open or shorted, Exhaust Camshaft Position Actuator Bank 1 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: P2091 indicates Exhaust Camshaft Position Actuator Solenoid Control Circuit High Voltage Bank 1.
Common causes: Common causes include Faulty Exhaust Camshaft Position Actuator Solenoid Bank 1, Exhaust Camshaft Position Actuator Bank 1 Solenoid harness is open or shorted, Exhaust Camshaft Position Actuator Bank 1 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 17,073

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
Comments
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Code P2091 Description

The Camshaft Position (CMP) Actuator system enables the Engine Control Module (ECM) to change the timing of the camshafts while the engine is operating. The CMP actuator solenoid signal from the ECM is Pulse Width Modulated (PWM). The ECM controls the CMP actuator solenoid duty cycle by controlling the amount of solenoid ON time. The CMP actuator solenoid controls the advance or the retard of each camshaft. The CMP actuator solenoid controls the oil flow that applies the pressure to advance or retard the camshafts.
Ignition voltage is supplied directly to the CMP actuator solenoid. The ECM controls the solenoid 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 if the ECM detects a short to voltage in the CMP actuator solenoid circuits for more than 4 seconds or a cumulative of 50 seconds, when the solenoid is commanded ON.

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

What does this mean?

What are the Possible Causes of the DTC P2091?

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

How to Fix the DTC P2091?

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 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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Information for Specific Makes

P2091 Audi — Camshaft Position Actuator 'B' Control Circuit Short To Battery Plus Bank 1
P2091 BMW — 'B' Camshaft Position Actuator Control Circuit High Bank 1
P2091 Buick — Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Bank 1
P2091 Cadillac — Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Bank 1
P2091 Chevrolet — Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Bank 1
P2091 Dodge — 'B' Camshaft Position Actuator Control Circuit High Bank 1
P2091 Ford — 'B' Camshaft Position Actuator Control Circuit High Bank 1
P2091 GMC — Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Bank 1
P2091 Lincoln — 'B' Camshaft Position Actuator Control Circuit High Bank 1
P2091 Mercedes-Benz — 'B' Camshaft Position Actuator Control Circuit High Bank 1
P2091 Mercury — 'B' Camshaft Position Actuator Control Circuit High Bank 1
P2091 Suzuki — Exhaust Camshaft Position Actuator Solenoid Control Circuit High Voltage Bank 1
P2091 Volkswagen — Camshaft Position Actuator 'B' Control Circuit Short To Battery Plus Bank 1

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.