Rick's Free Auto Repair Advice

P0013 P0014

What causes trouble codes P0013 P0014?

P0013 is a generic trouble code that’s defined as: Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit. P0014 is a generic trouble code that’s defined as: Exhaust Camshaft Position System Performance. Sound like Greek to you? Here’s an explanation.

In an engine with variable valve timing, the engine computer (ECM) determines the conditions under which it would like to advance or retard the intake and exhaust camshafts to develop more power or control emissions better.

To move the camshafts, the ECM uses oil

camshaft phaser

Actuator solenoid

pressure from the engine. By pulsing the oil pressure on and off with a camshaft position actuator solenoid, it can control how much the camshaft actuators move. By checking RPM and the oxygen sensors it can tell whether it’s getting the expected result.

What goes wrong to set a P0013 P0014 trouble code?

The ECM assumes you’ve used the recommended oil viscosity and that you’ve been changing your oil according the car maker’s oil change intervals. If you’re using a different oil viscosity, then the oil flow will be different during each pulse of the solenoid, which can a P0014 performance code. Oil sludge clogging the solenoid screen can also set a P0014. Start by checking for sludge buildup in the solenoid screen.

However, especially on GM vehicles, a P0013 trouble code is usually caused by a bad camshaft actuator solenoid. Since the P0013 trouble code refers to the control circuit, you should start by checking for a short to ground, open or high resistance first.

GM solenoids should read 4.1 to 7.7 ohms. If your reading is outside that value, replace the solenoid.

©, 2019 Rick Muscoplat




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 signal from the ECM is pulse width modulated (PWM). The ECM controls the camshaft position actuator solenoid duty cycle by controlling the amount of solenoid ON time. The camshaft position actuator solenoid controls the advance or the retard of each camshaft. The camshaft position actuator solenoid controls the oil flow that applies the pressure to advance or retard the camshafts.


Posted on by Rick Muscoplat


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