Help! Recurring P2090 code - Pontiac Solstice Forum
 
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post #1 of 6 (permalink) Old 04-18-2019, 07:33 PM Thread Starter
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Help! Recurring P2090 code

Looking for some help with a recurring p2090 code that keeps setting in the computer. I have installed a new exhaust cam timing actuator, checked the harness wiring (everything seems fine), the connector is fine going onto the actuator (I even put dielectric grease on the contacts) and locks in good. The oil level is right on the full line of the dipstick (fresh Mobil 1 O/C), and oil pressure is good!
I can't figure out why it keeps setting this code??? I can clear it and the car runs fine for a day or two and then the code resets and it runs like crap!
Any ideas folks???
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post #2 of 6 (permalink) Old 04-18-2019, 09:47 PM
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Did you replace both or just one? Replace them both....not just one. If that doesn't work, seeing as how it's a p2090, you might need actual actuators on the cams themselves...or you may have skipped a link in the timing chain. Usually that's the code (IMSMC) that you get when you have skipped a link on the timing chain. How many miles? What year? GXP or NA?

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post #3 of 6 (permalink) Old 04-20-2019, 03:21 PM Thread Starter
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Originally Posted by The_Ghost View Post
Did you replace both or just one? Replace them both....not just one. If that doesn't work, seeing as how it's a p2090, you might need actual actuators on the cams themselves...or you may have skipped a link in the timing chain. Usually that's the code (IMSMC) that you get when you have skipped a link on the timing chain. How many miles? What year? GXP or NA?
No I only replaced the exhaust actuator not the intake actuator (since it was only setting a code for the exhaust side). I did buy both, so I will install the intake side actuator to see if that makes any difference.
I don't believe that it has jumped timing, since the car runs perfectly when I clear the code.

Thank you!
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post #4 of 6 (permalink) Old 04-20-2019, 03:24 PM Thread Starter
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BTW... car is an '07 GXP automatic with 103,000 miles
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post #5 of 6 (permalink) Old 04-20-2019, 03:28 PM Thread Starter
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Originally Posted by JohnWR View Post
It could also be a bad sensor, or loose sensor connector.
Which sensor?
Is the "actuator" that I replaced not in fact an actuator but a sensor?
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post #6 of 6 (permalink) Old 04-20-2019, 04:16 PM
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Originally Posted by coolfog View Post
Which sensor?
Is the "actuator" that I replaced not in fact an actuator but a sensor?
My apologies, I posted without checking the actual code and jumped to a conclusion.
The sensor isn't part of this fault. There is also no need to replace the intake camshaft solenoid.

P2090 is a short to ground of the exhaust camshaft actuator or its control circuit.

The possible causes are a bad solenoid, a damaged wire or connector, and a bad ECM.
You have replaced the solenoid, and say that the wiring and connectors are good.

The only thing left, according to the service manual, is the ECM.

My next step would be to unplug each of the connectors in the circuit and make sure that they are clean and dry.
If that doesn't help you are likely looking for a new ECM.

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