P2091: B Camshaft Position Actuator Control Circuit High Bank 1
The P2091 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in the control circuit of the 'B' camshaft position actuator on Bank 1. This actuator adjusts camshaft timing for optimal engine performance. A high voltage reading suggests a short to power, faulty actuator, or wiring issue. This can cause poor engine performance, increased emissions, and potential drivability problems.
01. Most Common Causes
- Faulty camshaft position actuator solenoid
- Short to power in the actuator control circuit
- Damaged wiring or connectors
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or engine misfire
- Reduced fuel economy
- Poor acceleration or hesitation
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect wiring and connectors for damage or corrosion.
Step 3: Test actuator solenoid resistance and compare to specs.
Step 4: Check for shorts to power or ground in the control circuit.
Step 5: If all else is fine, test PCM output or replace PCM.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause engine performance issues and potential damage to the catalytic converter.
How much does it cost to fix?▼
Repair costs typically range from $50 to $150 for parts and labor, depending on the cause and vehicle model.