Author Topic: Now: Shoe Goo was: GXPsy limped home today or code P0335 (Read 16336 times)

Rogue · « **Reply #25 on:** June 02, 2015, 07:07:27 AM »

Bob - Thank you. I do not have access to the test equipment necessary for all the diagnostics, however I do have the basic VOM which should help with some of the diagnostics. At this point I believe there may be a chance the issue is related to the camshaft sensors. I have not checked them yet.

Jim · « **Reply #26 on:** June 03, 2015, 02:15:10 PM »

Rogue,

I remember reading on another forum (Cobalt forum I think) about this code and the owner eventually fixed it by hardwiring the sensor to the harness. I don't know what the connector looks like so I have no first-hand experience but maybe the connection point is losing contact intermittently.

Rogue · « **Reply #27 on:** June 05, 2015, 08:39:28 PM »

Good input. Thank you. I'll try to check, however the sensor is not that accessible.

Rogue · « **Reply #28 on:** June 16, 2015, 07:40:23 AM »

After a significant amount of time spent trying to track down the problem I finally relented and took GXPsy to the dealer. I got a call from them late yesterday advising they had to order a new ECM for her. Fortunately, still under the emissions warranty. Glad it's them picking up the tab and not us!

Sly Bob · « **Reply #29 on:** June 16, 2015, 07:48:18 AM »

Here's hoping that takes care of it.

Rogue · « **Reply #30 on:** June 16, 2015, 12:58:34 PM »

Thanks, Bob. We hope so, too. :-)

Critterman · « **Reply #31 on:** June 16, 2015, 02:56:33 PM »

That is good news, always better on their dime. Everything else still sorted out?

Rogue · « **Reply #32 on:** June 16, 2015, 07:20:08 PM »

They need the new ECM (wonder how they plan on loading the GMPP program?), then they'll test the sensor connector. I'm sure they'll try to find some way to justify a charge for that. After that it should be all sorted. Let's hope!

Rogue · « **Reply #33 on:** June 16, 2015, 07:20:56 PM »

However.....I would expect a faulty connector to also be included in the emissions warranty.....

Rogue · « **Reply #34 on:** June 16, 2015, 07:22:27 PM »

This will be the third ECM in GXPsy. The one from the factory, then two replacements. I don't understand why the recurring problems. I sure hope the third time is charmed.

Rogue · « **Reply #35 on:** June 20, 2015, 03:20:12 PM »

The dealer has replaced the ECM with a factory fresh new one, programmed it.....and the car won't start. They put the original back in....and the car won't start. I'm sooooo glad this is under warranty. I'd hate to be responsible for those labor charges!

Sly Bob · « **Reply #36 on:** June 20, 2015, 09:47:56 PM »

Yeah the bill would be a nasty one!

Hope they figure out what's going on soon.

Gentleman Jack · « **Reply #37 on:** June 21, 2015, 03:31:05 AM »

Key relearn and changing code from automatic to manual transmission should allow it to start.

Rogue · « **Reply #38 on:** June 22, 2015, 07:02:42 AM »

Interesting. I'll pass that along as an option. Thanks.

Rogue · « **Reply #39 on:** June 24, 2015, 06:18:53 PM »

Finally got GXPsy back from the dealer. I'll try to make this as simple as possible....when the engine was replaced, the tech apparently did something wrong in the install that caused the original ECM to keep recalibrating itself. After enough driving, there was no more space for recalibration and it started throwing codes. In this case P0335. The problem was traced to the computer and a new ECM was installed. However....the old computer was downloaded to the new one, and the problem continued. The tech and GM technical services ultimately decided to wipe the new computer clean and do a total reprogram. Voila. GXPsy is back home and GM ate a HUGE repair bill since it's still (just barely) covered by factory emissions warranty. Whew.

Sly Bob · « **Reply #40 on:** June 24, 2015, 07:25:56 PM »

Glad GXPsy is back, that was quite the ordeal!

Gentleman Jack · « **Reply #41 on:** June 24, 2015, 07:35:58 PM »

Sweet!!!!!

DeepBlueGXP · « **Reply #42 on:** June 25, 2015, 05:50:33 AM »

So is the recalibrating issue fixed

Rogue · « **Reply #43 on:** June 25, 2015, 07:23:59 AM »

I'll find out when she gets home from work today. She was grinning from ear to ear when she pulled out of the driveway.

Rogue · « **Reply #44 on:** June 25, 2015, 07:42:22 AM »

Pat just emailed me from her office. The ride in to work was satisfying. As much or more power than the day she had the GMPP tune originally installed. Time will tell if the recalibrating issue has been resolved, but right now I'll give that question a qualified yes as the answer.

Rogue · « **Reply #45 on:** June 28, 2015, 10:20:41 AM »

GXPsy has been back home for several days. According to Pat she now runs the best ever. The permagrin is back!

Gentleman Jack · « **Reply #46 on:** June 28, 2015, 10:55:22 AM »

WhooHooo!

Better save up for new tires!

Rogue · « **Reply #47 on:** June 28, 2015, 05:19:18 PM »

You got that right! Pat's motto has always been "the first one to the speed limit wins." And right now that car of hers is running VERY strong. We don't know what they did when they reloaded everything new into the ECM, but it feels like an updated GMPP. Hmmmm....I wonder if GM ever did an update to the GMPP? If so, that might explain the sudden shot of extra horses.....

Gentleman Jack · « **Reply #48 on:** June 28, 2015, 07:38:48 PM »

Wait until it's out of warranty and you get an aftermarket tune!

Rogue · « **Reply #49 on:** June 28, 2015, 07:53:54 PM »

Yes indeed. And it's nice to have gotten it done at GM's expense. :-)

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Author Topic: Now: Shoe Goo was: GXPsy limped home today or code P0335 (Read 16336 times)