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Hey gang,
I have a 2003 C2 Cab that I have had for close to a year. Over the Christmas Break I did a few mods:
Bens Plenum
GT3 throttle Body
EVOMS Intake
Exhaust Removal and Fabspeed bypass pipes
Softronics ECU Tune
Car ran great the first two days and then some error codes popped up as well as the CEL light with warning to go to the nearest garage. I also noticed that the car ran a little rougher and seemed to have the rpm jumping up and down by 2-300 rpm. These were the error codes:// 1) 1109 1109
// 2) 0335 0335
// 3) 0346 0346
// 4) 0300 0300
// 5) 0301 0301
// 6) 0302 0302
// 7) 0303 0303
// 8) 0022 0022
// 9) 0103 0103
Then I cleared the codes and rechecked all the fittings and tightened up some of the clamps. Again ran very good for a few days and the same warning came up with the following codes. I notice that when the CEL cam on the car idle fluctuates between 600-800. // 1) 1109 1109
// 2) 0346 0346
// 3) 0300 0300
// 4) 0301 0301
// 5) 0302 0302
// 6) 0303 0303
Tuner advised me that I have a vario cam error, could be from coils or plugs...,maybe a faulty cam positioning sensor... I will be going to check it out this week but wanted to see if any of the gurus out there had any thoughts. I was thinking of trying another throttle body (948.605.115.03) but seems like this could be a completely different issue that happened to pop up at the same time i completed the mods.
It would be kind of odd for it to be a random coincidence. You changed a lot of stuff...so you have a lot of independent variables to guess at. Maybe return it to stock, clear the codes, and see what happens after a few days. Then slowly add in the mods one at a time, a few days in between, and see if/when the error codes start popping up.
The best advice I can think of is to return it to stock. Seriously, there is not much left in the M96 motor as far as bolt ons go that measure any real power gain with out opening up the motor and getting a proper custom tune. If you still want to go through with throwing parts at it, do it one thing at a time and work the bugs out in steps.
So I removed the 997 GT3 throttle body and tried the 996 GT3 throttle body. I think the other TB may have had some issue but current codes seem to continue to show Bank 1 error:
Good luck. Hope it is easy to sort out and your shop gets it quickly.
I did a lot of software troubleshooting (debugging) in my career, and never found it easy to get to root cause when you are altering too many variables at one time. Cars aren't much different, except the parts are often physical, rather than virtual. The process is the same though (at least for me).
In my experience throwing parts (like a different GT3 throttle body) at a problem like this isn't the best troubleshooting method. I'd take it all the way back to stock (as it was prior to adding all those parts) and so you have an "apples to apples" comparison. If you do that, and still get new codes thrown that match the ones you're seeing now, at least you know where you stand. I'd rather troubleshoot from a known good baseline than a uncertain state with lots of variables.
02-26-2018, 04:59 PM
996 Error Codes after some Mods
