Codes P0017 and P0023

2007 GMC ACADIA
130,000 MILES
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ARMANDO ORTEGA
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My engine was fixed. I believe they played with the timing chain and now I have those two codes.
Aug 18, 2021 at 8:32 AM
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ASEMASTER6371
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Good afternoon,

What was repaired on the engine? Please give me the details.

Both codes are related to the timing chain.

Roy
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Aug 18, 2021 at 10:06 AM
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ARMANDO ORTEGA
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They replaced the valves.
Aug 18, 2021 at 12:51 PM
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ASEMASTER6371
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Okay, thank you.

They have the timing chain on wrong.

Return the car to the repair shop and have them set the timing correctly.

I attached a diagram of the lower chain that is most likely the issue.

I attached a YouTube video of the procedure for you.

https://www.youtube.com/watch?v=BhDs1GcwRCs

Roy
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Aug 18, 2021 at 1:14 PM
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ARMANDO ORTEGA
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Because it lost compression.
Aug 18, 2021 at 1:21 PM
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ARMANDO ORTEGA
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Thanks.
Aug 18, 2021 at 1:23 PM
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ASEMASTER6371
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You are welcome.

Always glad to help.

Roy
Aug 18, 2021 at 1:29 PM
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ARMANDO ORTEGA
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Replacing the camshaft position sensor and crankshaft position sensor could be a solution?
Aug 18, 2021 at 1:30 PM
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ASEMASTER6371
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No, not at all. The timing is incorrect. The sensors just send a signal to the ECM. They have nothing to do with adjusting the timing.

Roy
Aug 18, 2021 at 1:35 PM
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ARMANDO ORTEGA
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Okay, thanks.
Aug 18, 2021 at 4:27 PM
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ASEMASTER6371
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You are welcome.

Always glad to help.

Roy
Aug 18, 2021 at 4:36 PM