Very strange problem

[driver456]

I had to change a rear stud(97Vette).I thought I could take the nut off the hub and pop the stud out.Did not work the way I thought,So I tightened the nut back up and drilled a hole in the back of the dust plate.Long story short I changed the stud put the wheel back on.The next day I start the car,As the car is running I flash a tune in w/Road Runner because I was going to race and the SERVICE TRACTION CONTROL & ABS came on, code C1276 So I thought I screwed something up at the rear wheel.Took off the wheel everything looked OK,Screw it,Drove to the track,Raced, drove home.Check engine light still on.Today I checked the EBCM plug with an ohm meter like the manual said and it kind of pointed at the PCM.I have an extra PCM so I put that one in and no more code,Cool.I flash COS#5 in and the check engine light comes back on:shock: I flash the stock tune back in no more SERVICE TC & ABS.I kept switching pcm's from the RR to regular PCM.I could not get the RR to work at first,I had a NO COMM. The OS 12212156 seems to work in the regular PCM. I tried the RR one time, Flashed in OS 12212156 and it seems to work,NO check engine light.So what the heck is going on with COS#5 I had it in for awhile with no problems until now.............Paul

[mr.prick]

So, you think the RR has something to do with the DTC or the COS?
Maybe it has not set off again because of all the reflashing.

It is possible you have a pinched wire.

[driver456]

So, you think the RR has something to do with the DTC or the COS?
Maybe it has not set off again because of all the reflashing.

DTC C1276 LF Solenoid Circuit Open or Short to Ground.
It is possible you have a pinched wire up front.
Strange how this is not for the wheel you had issue with.

I think its the COS#5 that has the problem because now the RR is fine with OS 12212156.As soon as I flashed the COS#5 back in the SERVICE TC & ABS came back on.C1276 is delivered torque curcuit......Paul

[mr.prick]

:doh2:
I posted the wrong DTC definition.

[driver456]

:doh2:
I posted the wrong DTC definition.

Yes you did:grin: I went out and turned the key on and no check engine light.I deleted my COS folder out of my lap top and tranfered the COS folder from my desk top to my laptop.I'll test it out tomorrow.

[driver456]

OK I flashed COS#5 in and the SERVICE TC & SERVICE ABS came on,Then I flashed OS 12212156 back in and NO SERVICE TC & ABS.What could be wrong....................Paul