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Traction control light; hard shift

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Old 02-08-2018, 01:32 PM
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Yeah I am beginning to wonder too - although he may have two HHRs.

No mention of check engine light - which should come on with a p0301 code. and he didn't anwer the question I raised about it.

I'm out
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Old 02-08-2018, 01:41 PM
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OK, in your 2006 2.4 HHR , it was designed for AC Delco Iridium 41-103 plugs




Those Bosch plugs can foul and cause a misfire code.
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Old 02-08-2018, 01:43 PM
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Originally Posted by whopper
Yeah I am beginning to wonder too - although he may have two HHRs.

No mention of check engine light - which should come on with a p0301 code. and he didn't anwer the question I raised about it.

I'm out
I'm going to follow you.
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Old 02-08-2018, 08:44 PM
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Yes, I remember he has 2 HHRs.

Agree, it could be the non-ACDelco spark plugs. That's an easy theory to test.
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Old 02-08-2018, 10:00 PM
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Originally Posted by whopper
Yeah I am beginning to wonder too - although he may have two HHRs.

No mention of check engine light - which should come on with a p0301 code. and he didn't anwer the question I raised about it.

I'm out
yes I have two HHR's one is an 09 SS. The other is an 06 LT. Sorry for not responding. I didont get any notifications.
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Old 02-08-2018, 10:01 PM
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Originally Posted by Oldblue
OK, in your 2006 2.4 HHR , it was designed for AC Delco Iridium 41-103 plugs




Those Bosch plugs can foul and cause a misfire code.
Nah it was misfiring before I put the plugs in. Still does it
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Old 02-08-2018, 10:02 PM
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Originally Posted by donbrew
It is the p0301 that is setting the traction control and hard shifting.

After you do what Oldblue suggested you need to do a compression and leakdown test.
Ok thanks for the info. I will check it out
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Old 02-09-2018, 07:10 AM
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Go to your "User CP" and set your notifications.
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Old 02-09-2018, 07:37 AM
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When you pull the plugs to do the compression test, double check them for differences between cylinders
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Old 02-09-2018, 01:55 PM
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Originally Posted by whopper
Check this thread and it's suggestions - https://www.chevyhhr.net/forums/gene...d-shift-59930/

It sounds like a hub problem, but to determine which one you need to use a OBDII code reader that will read more than just the basic engine codes - some suggestions are in the above thread.
Will so thank you:)
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