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No code or check engine light comes on, but my code reader…

No code or check...

No code or check engine light comes on, but my code reader says EVAP cycle is incomplete.

Mechanic's Assistant: Does the light stay on, or does it blink?

No check engine light comes on.

Mechanic's Assistant: What is the model/year of your Chevy?

2009 chevy Malibu LT 3.6L

Mechanic's Assistant: Are you fixing your Malibu yourself? What have you tried so far?

Yes. I've changed the purge valve. Also all 4 camshaft position sensors and crankshaft position sensor after getting codes P0016-19

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Would a stretched timing chain/belt cause the codes P0016-19 to trigger even after new camshaft position sensors were installed?

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Answered in 7 minutes by:
3/26/2018
david craig
david craig, Auto Mechanic
Category: Chevy
Satisfied Customers: 5,971
Experience: owner/mechanic at 3D Automotive
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Hi my name is ***** ***** I'll be more than happy to assist you. Please allow me a few minutes to review your information. Thank you

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if the codes are gone then I wouldn't worry about a stretched chain triggering them after replacing the sensors. as far as evap cycle not completed how long as the vehicle been driven since erasing the codes?

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Customer reply replied 4 months ago
I replaced all 4 camshaft sensors and the crankshaft sensor and the codes P0016, P0017, P0018 & P0019 came back after I cleared the codes. I've driven between 40-82 miles between clearing codes. I replaced the purge valve about 2 months ago. I've never gotten a code for EVAP (heard a strange noise from the valve and decided to change it). I have driven over 500 mi. since changing the purge valve. If the other codes for the camshaft sensors are coming back would that cause the EVAP on my code reader to not reset?

no, it wouldn't cause that. and it didn't mention that the codes came back. but everytime you try to erase codes it resets the evap monitors.

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Customer reply replied 4 months ago
OK, makes sense why the EVAP says incomplete on my code reader. How many miles do I need to drive to cycle the EVAP? If the sensors are new what else do you think is causing the codes for the camshaft sensors to trigger? It seems unusual for all 4 to trigger (Bank 1, sensors A & B & Bank 2, sensors A &B).

standby let me see if there are any bulletins on this issue

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TSB

Ask Your Own Chevy Question

TSB

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Customer reply replied 4 months ago
Thanks for the PDF. Just want to ask your opinion. I spoke with 2 mechanics and when the subject of replacing the timing chain came up one of them said I would be better of with getting a new engine rather than to replace the chain. Your thoughts on why he would say this?

standby

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well maybe because the labor times aren't too different. 7.3 hours for the chains and 8.8 for the engine. but, the chain kit is much cheaper than a new engine by a long shot. they might just not want to deal with replacing the chains. I would go with the chains replacement

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Customer reply replied 4 months ago
Thanks. I thought the same. One last question. Can you give me a ballpark estimate for parts and labor if done at a chevy dealership?

oh brother by the dealer? I couldn't and don't want to imagine. probably 1***-**-****.00

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at my shop, it would cost approximately, 600.00 parts included

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Customer reply replied 4 months ago
LOL......I just wanted to get a dealer price. I have a mechanic, just wanted to make sure he's not going to charge me dealer prices. Thanks for your help.

you are very welcome and Please note that customer satisfaction is my number one goal and rating this chat session 3 or more stars will be greatly appreciated and will allow any follow up questions you may have. we can chat back and forth many times until your issue is taken care of.
Thank you for rating my assistance and for using Just Answer.

david craig
david craig, Auto Mechanic
Category: Chevy
Satisfied Customers: 5,971
Experience: owner/mechanic at 3D Automotive
Verified
david craig and 87 other Chevy Specialists are ready to help you
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thank you very much

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