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08 Chevy HHR computer ruined by shop??

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Old Jun 4, 2022 | 09:45 PM
  #11  
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A CEL could be caused by a loose gas cap. Only the code number knows if it is related to anything. Most auto parts stores will read the codes for free.
Old Jun 5, 2022 | 06:52 AM
  #12  
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I’d suggest taking it back to the dealership as they just worked on it.
Old Jun 5, 2022 | 08:29 PM
  #13  
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Originally Posted by donbrew
A CEL could be caused by a loose gas cap. Only the code number knows if it is related to anything. Most auto parts stores will read the codes for free.
P1133 great...............


Originally Posted by Oldblue
I’d suggest taking it back to the dealership as they just worked on it.
Kinda leery at this point seeing i just spent 340 for them to diagnose and reset my ecm etc.
Old Jun 5, 2022 | 08:36 PM
  #14  
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OK, you have a bad #1 O2 sensor. What has that got to do with any computer?
Did somebody install a Bosch O2 sensor?
Any silicone used
any oil burning
any coolant burning
Old Jun 5, 2022 | 08:55 PM
  #15  
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Originally Posted by donbrew
OK, you have a bad #1 O2 sensor. What has that got to do with any computer?
Did somebody install a Bosch O2 sensor?
Any silicone used
any oil burning
any coolant burning
both O2 sensors were replaced, the #1 (exhaust manifold) is a Bosch sensor, #2 is acdelco i believe

no silicon used no oil or coolant burning.

The computer issue happened when the mechanic was working on my car and let it die. thus causing the key fob and TPS sensor issues, also it seemed to keep the ECM from going into a "ready" status, or even seeing the CEL that popped as soon as the ECM was updated/reset.
Old Jun 5, 2022 | 09:15 PM
  #16  
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Use OEM sensor for the one in the manifold.
Old Jun 5, 2022 | 09:49 PM
  #17  
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My personal experience is that Bosch O2 sensors don't respond fast enough. TDK/NGK is OEM, they make ACDelco. Bosch are only about $2 cheaper.
The only way a computer can be trashed is by a short circuit, like touching the case with a live wire.
A 2008 model will need to have the RCDLR firmware updated after a loss of voltage. That is NOT the "computer".
The reason for "not ready" is the Bosch sensor. That might have been the original problem, I doubt it. "Lean or whatever" is not usually from a bad sensor.

Most "anti-seize" that is used is silicone based, many shops use it when installing O2 sensors. When it gets hot it releases Silicone that gets on the sensor element and renders it useless, along with the cat. Use a copper or glass based compound to seal O2 sensors.

Last edited by donbrew; Jun 5, 2022 at 10:19 PM.
Old Jun 6, 2022 | 01:28 PM
  #18  
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Originally Posted by donbrew
My personal experience is that Bosch O2 sensors don't respond fast enough. TDK/NGK is OEM, they make ACDelco. Bosch are only about $2 cheaper.
The only way a computer can be trashed is by a short circuit, like touching the case with a live wire.
A 2008 model will need to have the RCDLR firmware updated after a loss of voltage. That is NOT the "computer".
The reason for "not ready" is the Bosch sensor. That might have been the original problem, I doubt it. "Lean or whatever" is not usually from a bad sensor.

Most "anti-seize" that is used is silicone based, many shops use it when installing O2 sensors. When it gets hot it releases Silicone that gets on the sensor element and renders it useless, along with the cat. Use a copper or glass based compound to seal O2 sensors.
Ill pick up another O2 sensor, you are correct with the RCDLR being updated but according to the lead tech at the chevy dealership they had to reset "the computer", maybe it was to justify the cost going from 160 to 340.

CHristian brothers is where i got the O2 sensors replaced the Bosch i put in myself and didnt use any anti seize so i will replace it and make sure nothing was used on it and we will see where it goes from there.

I appreciate all yous guys help.

Edit* Autozone had an NTK brand but also had the AC Delco one as well so i picked up the AC delco and will install this weekend and fingers crossed.
Old Jun 6, 2022 | 02:24 PM
  #19  
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"Resetting the computer" is done by disconnecting the battery. Or, maybe they meant pushing the button on their computer to reboot it. At any rate the BCM and ECM have nothing to do with the RCDLR except for receiving data from it. FYI there are more than 3 computers on board.

Updating the software in the RCDLR calls for a flat rate of 1 hour "computer time" plus 20 minutes diagnostic, just because it takes a bit of training to do. The actual time involved is about 25 minutes including driving into and out of the shop. They do need to log into Techline to download the new firmware. It is scary computer work. Following prompts on computer screens is sooo demanding. Heck, the direction are in the TSB, if they deign to read it. My service advisor said "that's not my job". And the service manager said "it says something about software".

For posterity it is TSB 08-03-16-001B dated July 31, 2008. Applies to all the 2008 Delta platform models; HHR, Cobalt, Malibu, G5, G6, Solstice, AURA, SKY.
2008 was the first year of mandatory TPMS and it wasn't calibrated right.
Old Jun 15, 2022 | 09:21 AM
  #20  
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whelp bad news, i swapped out the O2 for an AC Delco, of course disconnected the battery, saw there was no anti-sieze which is good. wife drove the car for a few days and of course..... CEL comes up again. Ill get a new reading today to see what else could be going on.



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