04-03-2021, 05:48 PM | #1 |
Geoff
Drives: 2020 ZL1 Green Join Date: May 2013
Location: Houston
Posts: 1,718
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Tons of DTCs
Apologies this is so long...........
Well it started at a track event 6Mar. The car ran well, but the transmission was shifting harder than 'normal'. More of a jolt instead of quick & smooth. No CEL or DTC Yes, fluid has been changed whenever it gets to 15-19hrs of track time & level is good. There had been good transmission performance at a track day since the last change. 11Mar: I went on a 300mi round trip and had a CEL when I filled up upon my return. I should have gone to the dealer right away.....instead I cleared everything to see if they'd return. I drove around several days, nothing returned Engine codes P0700: TCM requested MIL Transmission codes U0073: control module communication bus “A” off Anti-lock brake codes U0140: lost communication with BCM CURRENT Power steering control module codes U0100: lost communication with ECM U0121: lost communication with electronic brake control module U0073: CAN bus communication Radio controls codes B1325: control module power circuit voltage below threshold Serial data gateway module codes U0073: CAN bus communication OBDII codes CURRENT OBDII codes P0700: transmission control system MIL request U0101: lost communication with TCM U0073: control module communication bus A off 19Mar: Was driving up to Eagles Canyon for a couple days and stop off at Cresson for a Monday funday on the way home. Planning a great time. About 180mi from home car got a CEL and the trans locked in a single gear, ~4000rpm at 40mph. Found a place to park and scan the codes. Tons of DTCs. Called my dealer, they said Onstar policy is to tow to the nearest dealership for repairs. This makes sense. It's Friday late afternoon 180mi from home, I'm not interest in being stuck, paying for a hotel without a car or renting a car for multiple days. Also I'm beyond my AAA range for a tow. Engine codes P0700: TCM requested MIL U0101: lost communication with transmission control module CURRENT U0121: lost communication with electronic brake control module CURRENT U0140: lost communication with body control module CURRENT Transmission codes U0073: control module communication bus “A” off U0100: lost communication with engine control module CURRENT U0121: lost communication with electronic brake control module CURRENT U0140: lost communication with body control module CURRENT Anti-lock brake codes U0140: lost communication with BCM CURRENT U0100: lost communication with body control module CURRENT U042B: invalid data received from chassis control module invalid serial data received CURRENT U0073: control module communication high speed CAN bus off CURRENT Body control module codes U0100: lost communication with engine control module CURRENT Parking assist module codes U0422: invalid data received from body control module Power steering control module codes U0100: lost communication with ECM U0121: lost communication with electronic brake control module U0073: CAN bus communication Radio controls codes B1325: control module power circuit voltage below threshold Serial data gateway module codes U0073: CAN bus communication OBDII codes CURRENT P0700: transmission control system (MIL request) U0073: control module communication bus “A” off Suspension control module codes U0073: control module communication bus A off Tire pressure monitor codes U0100: lost communication with engine control module CURRENT OBDII codes P0700: transmission control system MIL request U0101: lost communication with TCM U0073: control module communication bus A off U0100: lost communication with ECM/PCM A Looking back, I should have bucked up and paid $$$$ for the additional tow to get it back to my dealer with the codes in the car. I decided to clear the codes and keep going........... I made it about 10 more miles and got another CEL, but the transmission was shifting fine. Pulled over to read codes, only had 2...........decided I should hang it up and head to the dealership. Got an appointment for Sat morning. I did not clear the codes. Engine codes P015D: HO2S delayed response lean to rich bank 2 sensor 1 OBDII codes P015D: HO2S delayed response lean to rich bank 2 sensor 1 When I got to the dealer there was an additional PDR communication code (don't know the DTC #) When I dropped off the car, I gave the service writer a printout of all the codes that I cleared and why. Dealer replaced bank 2, front O2 sensor and told me to come get the car. I had my doubts about the fix so I drove the car for several days on longish trips, but kept within 100mi of dealership.......just in case. No CEL or DTC. I contacted a friend about running MSRH for a day to build my confidence in the car before I took it out of town. 2Apr: First session out was fantastic, car shifted perfect again and no CEL/DTC. Second session was not as good, got CEL, came in and read 2 codes Engine codes P0196: engine oil temperature sensor performance , warning indicator requested Antilock brakes U0140: lost communication with body control module Did not clear and went out for 2 more sessions, no additional codes and car performed well. Called the dealer, told them I'm coming in. Swung by the house to unload the car and went to the dealer. Service writer told me that the comm DTC is common "they all do it" and that he'd have an engine tech look at the oil sensor.?.? They gave me a Chevy Trax while the repairs are ongoing. I've got myself convinced that there is a wiring or module issue that is causing the communication issues and the oil sensor/O2 are symptoms showing up as faults due to miscommunication between the sensor and module. I told the service writer that I wasn't pissed off, but they need to spend time on the car and not just through parts at it. I absolutely understand that this is not an easy thing to sort out and it'll take some time.......... My plan is to see what happens this time and give them one more opportunity after this one and then start running up the org chart. Have any of y'all dealt with a long, difficult repair? What kind of timeline should I really expect here? If you read this far, I greatly appreciate your time and welcome your comments &/or experiences.
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04-08-2021, 03:17 PM | #2 |
Geoff
Drives: 2020 ZL1 Green Join Date: May 2013
Location: Houston
Posts: 1,718
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I guess it is too long and WAY too much info.
From all of the above, this is my request for feedback: Have any of y'all dealt with a long, difficult repair? What kind of timeline should I really expect here? Anyway: Picked it up today, they changed the oil temp sensor. I'll run it this weekend at MSRH and see how it does.
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04-08-2021, 04:34 PM | #3 |
Drives: 2016 2SS Convertible Join Date: May 2012
Location: St. Louis, MO
Posts: 1,702
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There have been TSBs for wire harnesses that have rubbed against belts or sharp corners in the engine bay. I would check for that and loose ground cables in the engine bay. Some people have had luck resolving electrical gremlins by disconnecting the negative battery cable for a few hours to reset the computers. Good luck! Chasing stuff like this will take some patience.
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04-08-2021, 07:38 PM | #4 | |
Geezer_loves_Camaros
Drives: 2018 2SS, Black, A8 Join Date: Dec 2018
Location: Austin
Posts: 224
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Quote:
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04-08-2021, 07:39 PM | #5 |
2019 ZL1 1LE MY GOON
Drives: 1980 Z28 Big Red. Join Date: Dec 2018
Location: Stoney Creek
Posts: 2,061
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I would be curious if a bulkhead connector is loose somewhere. Sometimes that will cause issues. Bad, loose grounds also.
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04-09-2021, 07:14 AM | #6 |
Drives: 2013 C6Z06 Join Date: Nov 2016
Location: PA
Posts: 1,577
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You don't leave a bluetooth OBD device plugged in when you run it do you? When i tried to use my OBDLink device for data on the track it would throw codes and the car would lose communication between modules. Sucks, but i just quit using it and had no more issues.
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Old Ride: 2016 Callaway SC630 Camaro SS
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04-09-2021, 09:33 AM | #7 | |
Geoff
Drives: 2020 ZL1 Green Join Date: May 2013
Location: Houston
Posts: 1,718
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Quote:
No bluetooth OBD device.......however, I do have a Banks gauge. I'll run without it Saturday. Appreciate the suggestion. A new update was issued recently for the Banks, I've loaded it and if no issues Sat, I may connect it for Sun and see what gives. My goal is to have confidence in the car again Everyone, I appreciate the feedback. Fingers crossed this weekend will go well. If not, it'll be towed back to the dealer with hopefully a bunch of codes that help them sort it out.
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04-12-2021, 05:53 PM | #8 |
Geoff
Drives: 2020 ZL1 Green Join Date: May 2013
Location: Houston
Posts: 1,718
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Good News
No codes all weekend! I did not try the OBD gauge, I have a few more track days coming up and will try it on the last day to verify if it is/was the problem.
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04-13-2021, 06:51 AM | #9 |
Drives: 2013 C6Z06 Join Date: Nov 2016
Location: PA
Posts: 1,577
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Glad to hear it. I'm interested if it was the OBD gauge and if these cars have some major issue running with them.
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Old Ride: 2016 Callaway SC630 Camaro SS
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04-13-2021, 09:28 AM | #10 |
Geoff
Drives: 2020 ZL1 Green Join Date: May 2013
Location: Houston
Posts: 1,718
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I found a TSB this morning on the subject. If codes show up when I plug the gauge back in, I'll contact the manufacturer to see if they're working on a solution.
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04-13-2021, 10:03 AM | #11 |
Thank you Al Oppenheiser!
Drives: Red Hot A10 ZL1 Convertible Join Date: Jun 2017
Location: Sarasota, FL
Posts: 4,963
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Sounds like you're on the right track with the gauge.
U codes are communication codes for issues within the bus itself, and can be caused if something is spamming unwanted noise into the bus, or dragging down voltage or surging voltage where it shouldn't. Wiring harness issues, bad modules, or aftermarket parts can all do this. The original rubbing harness issues were 1st year 2017 issues, and addressed via TSB under original 3/36 factory warranty. They were fixed in 2018+, so very likely not relevant to the OP's circumstance. For reference, the TSB's are below, and 2 can be easily done in minutes DIY with some of the proper tape, wire mold and zip-ties: |
04-14-2021, 09:09 AM | #12 |
Drives: 2013 C6Z06 Join Date: Nov 2016
Location: PA
Posts: 1,577
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I think we are on to something here. I hope I can use my OBDlink in my 2013 Z06 without issues.
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Old Ride: 2016 Callaway SC630 Camaro SS
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04-14-2021, 12:56 PM | #13 |
Drives: 21' LTI, '18 Traverse, '15 Mazda 6 Join Date: Oct 2020
Location: At the end of the DHL/Amazon Runway, KY
Posts: 183
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I have nothing to add here other than the second T in the title looked like an I when I first read it!
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04-14-2021, 06:08 PM | #14 | |
Geoff
Drives: 2020 ZL1 Green Join Date: May 2013
Location: Houston
Posts: 1,718
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Quote:
the first line of the post doesn't help any..........
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