HELP!!! Lots of codes!!!

NITEMER · 07-02-2020, 09:16 AM

The car is a 17 Auto ZL1 W/ 29K miles, Only mods are Roto-fab and a TM TB

I keep getting the following codes and seem to only get them after sitting all night, car runs the same as always doesn't even seem like it has a misfire.

P0301 Cylinder 1 misfire
P050D Cold start rough idle
U0401 Invalid data received from ECM/PCM "A"
C0242 PCM indicated PCM malfunction
U042B Invalid data received from chassis control module "A"
P0300 Random/Multiple cylinder misfire
And random diff faults

Started about 2 weeks ago so I took it to the dealer and they said it was because I have the fuse out for the exhaust valves

, I paid the diagnostics fee and took my car back. I've had that fuse off since 2017 and no issues till now.

So what i have done since is put a new battery just in case its because of low voltage since it seems to only happen after its been sitting. I swapped Cyl 1 and Cyl 2 ignition coils to see if the issues followed the coil. And I removed Cyl 1 spark plug to look at it. I did this yesterday so I'll wait a couple days to see how this effects anything. Car is out of bumper to bumper but has power-train warranty.

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gotswap · 07-02-2020, 09:54 AM

Crusty, I would probably change the plugs

LiqTenExp · 07-02-2020, 11:59 AM

Not a fuse issue, sounds like a bus/wiring issue.

pauly1119 · 07-02-2020, 01:11 PM

Take it to another dealer, seams like power-train warranty should cover it. Could be a PC or a harness, maybe even a ground. Have you inspected the wiring for corrosion?

SteveV · 07-02-2020, 01:21 PM

I have seen other posts on this forum where misfire issues were cleared with new plugs.

It is worth the gamble because new plugs are not that expensive.

NITEMER · 07-02-2020, 01:26 PM

I have not inspected any of the wiring and I will do spark plugs this weekend. I really don't think they are real codes, I do think it is an electrical issue but drive train warranty doesn't cover modules or wiring of any sort, per dealer.

*radz28* · 07-02-2020, 02:03 PM

I got those many codes like that after flashing the PCM. They were "Permanent" codes, though. What are you reading the codes with? A reader, from like Autozone, or something like that?

There have been reports of plug wires wiggling loose. After replacing the plugs, as already suggested, I'd just make sure you get good wire engagement on all the coils and plugs from the wires.

I wonder if you're battery was going bad and the voltage was dropping. Like I mentioned earlier, some of the codes you outlined, would pop-up after a flash. Those would usually go away over time with driving the car. Since you've replaced the battery, I'd just drive the car and see if those codes go away after several cold starts.

NITEMER · 07-02-2020, 03:01 PM

I havent flashed the car, I am using one of those cheap Amazon special bluetooth scanners(BlueDriver) The only "Permanent" code is P050D Cold start rough idle

I havent replaced the plugs or coils until yesterday when I removed Cyl 1 plug to inspect it so they shouldnt be loose.

I will drive it around and hopefully it was just the battery being junk.

pauly1119 · 07-02-2020, 04:10 PM

Quote:

Originally Posted by NITEMER

I havent flashed the car, I am using one of those cheap Amazon special bluetooth scanners(BlueDriver) The only "Permanent" code is P050D Cold start rough idle

I havent replaced the plugs or coils until yesterday when I removed Cyl 1 plug to inspect it so they shouldnt be loose.

I will drive it around and hopefully it was just the battery being junk.

I can tell you a low battery has scared me many times with my Corvette. Hopefully that is it.

*mlee* · 07-02-2020, 04:22 PM

Get rid of that TB for starters... that is if you have the old one. All kinds of issues pop up with those.

bobby35ny · 07-02-2020, 04:44 PM

If it were me, before I'd change anything I would bring the car back to 100% stock and work from there. Even a loose rotofab clamp will give crazy errors that have nothing to do with the loose clamp, car is misfiring, doesnt mean what you think.

Stephen12ZL1 · 07-03-2020, 06:49 AM

My feeling is spark plug replacement, swap to stock throttle body, and recheck all connections to the rotofab including the electrical connection to the MAF. Disconnect battery for 10 min then reconnect. Clear codes and retry.

Rnovrit · 07-04-2020, 10:45 AM

I got the exact same issue on cyl 8. Change your plugs. If you want to do a little diagnostics, swap the plug/coil/wire to a different cylinder one at a time. Each time clear the codes and test run it. If the misfire follows the component, you found your failed part.

nighttowl · 07-04-2020, 02:23 PM

Is this a crack?

07-02-2020, 09:16 AM	#1
NITEMER Drives: 2017 Camaro ZL1 Join Date: Jan 2018 Location: Berwyn Posts: 37	HELP!!! Lots of codes!!! The car is a 17 Auto ZL1 W/ 29K miles, Only mods are Roto-fab and a TM TB I keep getting the following codes and seem to only get them after sitting all night, car runs the same as always doesn't even seem like it has a misfire. P0301 Cylinder 1 misfire P050D Cold start rough idle U0401 Invalid data received from ECM/PCM "A" C0242 PCM indicated PCM malfunction U042B Invalid data received from chassis control module "A" P0300 Random/Multiple cylinder misfire And random diff faults Started about 2 weeks ago so I took it to the dealer and they said it was because I have the fuse out for the exhaust valves , I paid the diagnostics fee and took my car back. I've had that fuse off since 2017 and no issues till now. So what i have done since is put a new battery just in case its because of low voltage since it seems to only happen after its been sitting. I swapped Cyl 1 and Cyl 2 ignition coils to see if the issues followed the coil. And I removed Cyl 1 spark plug to look at it. I did this yesterday so I'll wait a couple days to see how this effects anything. Car is out of bumper to bumper but has power-train warranty. [ATTACH][ATTACH] [/ATTACH][/ATTACH] Attached Images

07-02-2020, 09:54 AM	#2
gotswap Drives: 2019 ZL1 Crush Join Date: Jan 2019 Location: Colorado Springs Posts: 564	Crusty, I would probably change the plugs __________________ 2019 Crush A10 E-Force 2650 670WHP 615WTQ All besides the 2650 is bone stock down to the air filter.

07-02-2020, 11:59 AM	#3
LiqTenExp Drives: 2017 ZL1 Join Date: Jan 2017 Location: NJ Posts: 905	Not a fuse issue, sounds like a bus/wiring issue. __________________ 2017 Camaro ZL1 Coupe M6 (847whp Dynojet on 93)

07-02-2020, 01:21 PM	#5
SteveV Drives: 2018 ZL1 Camaro 6M Red Hot Join Date: Aug 2013 Location: Cary, NC Posts: 1,137 View My Garage	I have seen other posts on this forum where misfire issues were cleared with new plugs. It is worth the gamble because new plugs are not that expensive. __________________ People are a lot like slinky's: not very helpful most of the time, but they bring a smile to your face when pushed down the stairs...

07-02-2020, 02:03 PM	#7
radz28 Petro-sexual Drives: Ultra-Grin Join Date: Oct 2006 Location: Crazy Coast Posts: 15,192 View My Garage	I got those many codes like that after flashing the PCM. They were "Permanent" codes, though. What are you reading the codes with? A reader, from like Autozone, or something like that? There have been reports of plug wires wiggling loose. After replacing the plugs, as already suggested, I'd just make sure you get good wire engagement on all the coils and plugs from the wires. I wonder if you're battery was going bad and the voltage was dropping. Like I mentioned earlier, some of the codes you outlined, would pop-up after a flash. Those would usually go away over time with driving the car. Since you've replaced the battery, I'd just drive the car and see if those codes go away after several cold starts. __________________ '20 ZL1 Black "Fury" A10, PDR, Exposed CF Extractor Magnuson Magnum DI TVS2650R // RFBG // Soler 103 // TooHighPSI Port Injection // THPSI Billet Lid // FF // Katech Drop-In // PLM Heat Exchanger // ZLE Cradle bushings // BMR Chassis-Suspension Stuff // aFe Bars // Diode Dynamics LEDs // ACS Composites Guards // CF Dash // Aeroforce // tint // other stuffs

07-02-2020, 01:11 PM	#4
pauly1119 Drives: 2018 ZLE Join Date: Feb 2018 Location: Palm City Fl Posts: 1,341	Take it to another dealer, seams like power-train warranty should cover it. Could be a PC or a harness, maybe even a ground. Have you inspected the wiring for corrosion?

07-02-2020, 01:26 PM	#6
NITEMER Drives: 2017 Camaro ZL1 Join Date: Jan 2018 Location: Berwyn Posts: 37	I have not inspected any of the wiring and I will do spark plugs this weekend. I really don't think they are real codes, I do think it is an electrical issue but drive train warranty doesn't cover modules or wiring of any sort, per dealer.

07-02-2020, 03:01 PM	#8
NITEMER Drives: 2017 Camaro ZL1 Join Date: Jan 2018 Location: Berwyn Posts: 37	I havent flashed the car, I am using one of those cheap Amazon special bluetooth scanners(BlueDriver) The only "Permanent" code is P050D Cold start rough idle I havent replaced the plugs or coils until yesterday when I removed Cyl 1 plug to inspect it so they shouldnt be loose. I will drive it around and hopefully it was just the battery being junk.

07-02-2020, 04:22 PM	#10
mlee CamaroFans.com Drives: ZLE & ZR2 Join Date: Oct 2008 Location: Conroe, TX Posts: 37,496 View My Garage	Get rid of that TB for starters... that is if you have the old one. All kinds of issues pop up with those. __________________

07-02-2020, 04:44 PM	#11
bobby35ny Drives: 18 ZL1 A10 Join Date: Nov 2008 Location: South East, FL Posts: 3,024	If it were me, before I'd change anything I would bring the car back to 100% stock and work from there. Even a loose rotofab clamp will give crazy errors that have nothing to do with the loose clamp, car is misfiring, doesnt mean what you think. __________________ 2017 ZL1 M6 Bog City, 2013 ZL1 M6, 2010 2SS M6 ZL1::J-E-T-S JETS JETS JETS

07-03-2020, 06:49 AM	#12
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,808	My feeling is spark plug replacement, swap to stock throttle body, and recheck all connections to the rotofab including the electrical connection to the MAF. Disconnect battery for 10 min then reconnect. Clear codes and retry. __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

07-04-2020, 10:45 AM	#13
Rnovrit Drives: 2018 NFG ZL1-1LE Join Date: Jun 2018 Location: Near the water Posts: 304	I got the exact same issue on cyl 8. Change your plugs. If you want to do a little diagnostics, swap the plug/coil/wire to a different cylinder one at a time. Each time clear the codes and test run it. If the misfire follows the component, you found your failed part.

07-04-2020, 02:23 PM	#14
nighttowl Sarcasm loading -------- Drives: 2018 ZL1 1LE Join Date: Dec 2011 Location: TX Posts: 1,806 View My Garage	Is this a crack? Attached Images __________________ "The salesman actually told me to stop getting it sideways during the test drive" 2018 MBM ZL1 1LE - Stock 2014 CRT ZL1 574 rwhp, 537 rwtq - SOLD 2010 IBM SS Camaro VVT L99 w/ TR6060 swap, 489 rwhp, 444 rwtq - SOLD

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