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Cobalt 2009 LS, 50K miles.

The check engine light comes and goes, sometimes P0013, sometimes P0014 and sometimes both.

Have done the followings:
1. Changed oil (SAE 5W 30);
2. Replaced the exhaust Camshaft Position Actuator Solenoid Valve (Genuine GM part #12655421);
3. Checked the CMP actuator solenoid connector & measured the resistance across the two pins. The new exhaust one reads 12.2 ohms and the old intake one reads 13 ohms.

But the light is still coming on, after 2 30-minutes driving.

What should I be checking next?

Thanks!
 

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Follow those wires and check for frayed jacket. It might be touching ground somewhere. You may need and other armor loom along the back side of the valve cover just above the exhaust manifold.
 

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Follow those wires and check for frayed jacket. It might be touching ground somewhere. You may need and other armor loom along the back side of the valve cover just above the exhaust manifold.
Thanks a lot! I will do what you have said. The final way is to go to a garage or buy a powerful scan software.
 
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