What Does P2091 Mean?
The exhaust camshaft (B cam) position actuator control circuit on Bank 1 is reading higher voltage than expected. The PCM detects excessive voltage or a short to power in the cam phaser control circuit.
Common Causes
35%
Short to voltage in cam phaser solenoid wiring
25%
Damaged solenoid connector causing cross-circuit contact
20%
Failed cam phaser solenoid with internal short to power
15%
Chafed wiring harness contacting battery voltage source
5%
Failed PCM driver circuit stuck high
Diagnostic Steps
1
Step 1: Disconnect cam phaser solenoid and check for voltage on control circuit with key on
2
Step 2: Inspect wiring harness for damage, especially near valve cover and engine mounts
3
Step 3: Measure resistance from control circuit to battery voltage with solenoid disconnected
4
Step 4: Check for oil contamination in connector causing cross-circuit shorts
5
Step 5: Wiggle test harness while monitoring voltage to locate intermittent short
Estimated Repair Cost
$150 - $900
Parts + labor, varies by vehicle and location
The exhaust camshaft (B cam) position actuator control circuit on Bank 1 is reading higher voltage than expected. The PCM detects excessive voltage or a short to power in the cam phaser control circuit.
The most common cause of P2091 (B Camshaft Position Actuator Control Circuit High Bank 1) is: Short to voltage in cam phaser solenoid wiring
Typical repair costs for P2091 range from $150 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Driveable but may experience reduced power, poor fuel economy, and rough idle. Extended operation can cause catalytic converter damage or engine wear.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2091 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Variable Valve Timing System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
