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2006 PT Cruiser check engine lights flash on then off

 
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Old 28 Oct 2018, 05:08 pm
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Default 2006 PT Cruiser check engine lights flash on then off

Hello to all my 2006 base model cruiser with manual trans has been having a issue lately if I hit a bump right say crossing railroad tracks at 45 mph the check engine lights may flash on for a few seconds then off, I have no other issues loss of power or any other electrical going on or off and it doesn't do it every time maybe twice a night or not at all. Any suggestions on where to start to look ?
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Old 28 Oct 2018, 06:45 pm
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Default Re: 2006 PT Cruiser check engine lights flash on then off

Sounds like something might be loose, check the ground wires to the right of the airbox...also check your oil level.

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Old 28 Oct 2018, 07:57 pm
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Default Re: 2006 PT Cruiser check engine lights flash on then off

Have you checked to see if you have any codes with the OBDII Scan Tool?

Have you checked to make sure the battery cables are making good contact and tight?

Is the battery moving around and not secure?

Have you done a visual check to see if any of the wires going to the sensors are rubbing against ground somewhere?
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Old 28 Oct 2018, 09:31 pm
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Default Re: 2006 PT Cruiser check engine lights flash on then off

The battery is secure and posts are tight, I have no starting issues so I don't think it is a ground but I will pull the air cleaner and remove and clean all of the connections just in case. The thing is it only does it sometimes I can drive down our pot holey road and no lights and sometimes no lights on railroad tracks either. I will check the oil and for codes also and post what I find.Thanks everyone.
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Old 28 Oct 2018, 10:12 pm
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Default Re: 2006 PT Cruiser check engine lights flash on then off

Quote:
Originally Posted by weaselguys View Post
The battery is secure and posts are tight, I have no starting issues so I don't think it is a ground but I will pull the air cleaner and remove and clean all of the connections just in case. The thing is it only does it sometimes I can drive down our pot holey road and no lights and sometimes no lights on railroad tracks either. I will check the oil and for codes also and post what I find.Thanks everyone.
Headlights or do you mean no check engine lights when going over the tracks?
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Last edited by ptcruisersteve; 29 Oct 2018 at 11:46 pm.
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Old 29 Oct 2018, 10:47 pm
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Default Re: 2006 PT Cruiser check engine lights flash on then off

The green wire to the O2 sensor that is just under and next to the drivers seat (bank 2?).
It would make my check engine light come on after a rough drive.
This wire was just swinging in the wind.
I don't know if it is like that on all PT's but it was on mine.
I used a zip-tie to anchor it down and the problem went away.
I left just a little slack because the exhaust pipe has got to move a bit.
While you cannot anchor it to the exhaust pipe itself, there is some metal frame-work that you can use to tie it down at the opposite end of the wire where it comes out of the engine compartment.

Good luck
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Old 07 Nov 2018, 10:27 pm
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Default Re: 2006 PT Cruiser check engine lights flash on then off

Well I have found nothing yet fluid levels are good and have not found anything loose I made 3 trips to work and back 70 mi ea and no check engine lights came on. On the next trip they flashed on repeatedly on the way to work then nothing on the way home or on the next round trip. Also my Ultra Gauge II shows no indication of something wrong. If the snow allows I will try and pull the battery this weekend again.
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Old 08 Nov 2018, 12:31 am
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Default Re: 2006 PT Cruiser check engine lights flash on then off

I had a similar issue on my old T-Bird.
Whenever I would drive for 45 min. the CEL would come on for maybe 20 min. then go back out for the rest of my trip. It would only happen at about the 45 min. mark.
Took it to the shop & found out it was the Oxygen Sensor. They reset computer, but they came back again.
I replaced the faulty sensor & never saw it again.

On the PT Cruiser, this will throw a code. Did you check the UG Pending Code..??s...if it's turned on.
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