Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that there's a problem with a part of the car's engine that helps control how the engine's parts move. It's like a conductor for an orchestra, but it's not working right.
The P1594 code is triggered when the Engine Control Module (ECM) detects an open or malfunction in the circuit that controls the 'B' camshaft position actuator on bank 2.
The camshaft position actuator is responsible for adjusting the timing of the camshaft to optimize engine performance. Bank 2 refers to the side of the engine opposite to bank 1 in a V-type engine. An open circuit or malfunction in the actuator control circuit can lead to improper engine timing.
• Check Engine Light is on
• Poor engine performance
• Increased fuel consumption
• Faulty camshaft position actuator
• Open or shorted wiring in the actuator circuit
• Faulty ECM
ECM: Engine Control Module
Camshaft: A shaft in the engine that controls the opening and closing of the valves
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the camshaft position actuator for proper function.
• Repair or replace damaged wiring or connectors.
• Replace the camshaft position actuator if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect and maintain engine wiring.
• Use high-quality engine oil.
• Follow the manufacturer's maintenance schedule.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid hard driving until the issue is resolved.
Check if your vehicle's powertrain warranty covers this repair.
This code has been associated with camshaft actuator issues in various V-type engines, especially in GM vehicles.
Moderate – It should be addressed soon to prevent further engine performance issues.
Driving with this code can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle stationary
The camshaft position actuator is located on the cylinder head of bank 2, typically near the timing chain or belt.
Q: Can I drive with a P1594 code?
A: It's not recommended to drive for long periods with this code active, as it can lead to engine performance issues.
Q: How can I reset the P1594 code?
A: The code can be reset with an OBD-II scanner, but it's important to fix the underlying issue first.
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