Just recently, I had the pleasure of replacing the fuel lines on my 2011 HHR. It being such a PITA job, the battery was disconnected for about 6 hours. After hooking up the battery again, I followed the recommend format of letting the engine come up to normal temp, driving a few miles and then leaving it in drive with the parking brake on for a bit. Didn't work! Every time I start it, I get 3 different messages coming up. What's the best way to reset and get rid of these?
Thanks, Rich

 

What are the messages? might help to diagnose the problem

 

sammy---"and then leaving it in drive with the parking brake on for a bit." Uh,,never heard of this and what is it supposed to do ?
You get 3 different messages. So are they some secret message that you can't post ? Really folks, if you are looking for help on this forum at least post up the details. Any messages or CEL numbers. We're not mind readers. (Well maybe Donbrew is a little bit. )

The title of this thread says "Computer Code Issue". So is it 3 CEL codes or just 3 messages on the DIC display ?

 

You can easily get rid of the warnings and codes by fixing the problems they are trying to tell you about.
We probably could help if you told us what warnings and codes.

 

Sorry, should have been more specific.
There are only two messages: SERVICE ESC & SERVICE TRACTION
I don't have the codes - I'll have to plug the scan tool back in tomorrow morning.
As for the procedure after reconnecting the battery, it comes from the Chilton manual, Section 5-6:
"ENABLING THE PCM TO RELEARN: After the battery has been reconnected, perform the following procedure in order to facilitate PCM relearning.
1. Start the engine and allow it to warm up to its normal operating temperature.
2. Drive the vehicle at part-throttle, under moderate acceleration and idle conditions, until normal performance returns.
3. Park the vehicle and apply the parking brake with the engine running.
4. On vehicles equipped with a manual transaxle, put the shift lever in NEUTRAL. On vehicles equipped with an automatic transaxle, put the shift lever in DRIVE.
5. Allow the engine to idle for about two minutes, or until the idle stabilizes. Make sure that the engine is at its normal operating temperature."

With all of that, I'm assuming that with the battery being disconnected for 6 hours, something in the system lost memory (?) and somehow needs to be relearned or otherwise incapacitated.

I posted the thread to see if anyone else has experienced the same issues and how to get it corrected.

Thanks for your help on this, Rich

 

Somebody at Chilton must be on drugs.
All you have to do to get the computers to reboot is disconnect the battery for a few minutes.
Rebooting rarely fixes your sort of problem. My money is on P0011 or P0013, that means replace the VVT valves.

 

Please check the codes again and post them here. How old is the battery, after a disconnect that long it could be a low voltage thing.

 

The cited procedure might have something to do with relearning the throttle position sensor. But that is not even required.
And for future reference: you don't really need to disconnect the battery to replace fuel lines, unless you are really paranoid.

 

Having the vehicle deenergised while working with the fuel system much less almost anything is basic procedure for almost any service. He followed the directions in what has been my go to source for vehicular truth and knowledge for almost half a century. The traction and stability controls might take a few more miles to settle in. Take it for a few hot laps around an empty parking lot.

 

Nope. Hot laps ? Hope you're not serious.
The service traction and service ESC messages are most likely on because of the pending CEL's (trouble codes) Certain powertrain trouble codes will disable certain systems. That's what those messages mean, that those particular systems have been turned off or disabled.