Hi all,
I have a hardtopp 99 with 130 k. I poured seafoam in the tank as a preventive cleaning solution, car started to run real bad(misfiring,etc) then now i have the engine check light on with the following codes Section 10 PCM code PO 442 H C, section SDM 58 CODE B 1001 H
Anyone can help? Thanks

 

The P0442 indicates a leak in the EVAP emission control system. 9 times out of 10 it is set because the cap on the fuel tank was not closed properly when you re-fueled the car. Check the fuel cap, reseat it, and clear the code. That should take care of it. If the code sets again, post a new thread and someone can step ypu through the diagnostic to find the leak in the EVAP system.

The B1001 sets when the SDM (the module that controls the airbag system) is replaced and not correctly programmed. The SDM should have your VIN programmed in it. It also has a serial number pre-programmed in it. When you start the vehicle, the VIN in the SDM has to match the VIN programmed in the PCM, and the SDM serial number has to match the serial number for the SDM programmed in the BCM. If either (or both) of these checks fail, B1001 sets. Sounds like the car had the airbags fired at some point in time, and whoever replaced the SDM (an airbag deployment "locks" the SDM and it MUST be replaced with a new one) did not program the new SDM correctly.

Neither of these addresses your engine miss. Usually a P0300 sets for an engine misfire. I'd pull and check each spark plug for fouling if the misfire started after you put the seafoam in, assuming that is the only thing you did to the engine.

 

Thanks. I never replaced the air bag? I did had the evap code before and found a small leak on one of the hoses, the rubber one that connect to the aluminium one near the body throttle. I will check the gas cap. I found a plug wire broken i drove the car to the dealer this morning about two miles and the engine light was flashing any thoughts on why? I left the car at the dealer but thinking to buy the wire and replace it or all of them since one does it the other ones will follow soon. Does it makes sense that i poured seafoam in the tanks but did not drove the car for a week all the debbris from the tanks is now in the fuel system or just a coincidence and it was the brokem wire that cause the car to run so bad. I hear only good things about seafoam and followed the instructions for tank and crankcase.

 

Probably just the broken plug wire.

 

When you say "I never replaced the air bag?"

Have you owned the car since it was new? If so, then possibly the BCM was replaced and not programmed with the SDM's correct serial number (SIR ID). As I explained above, one or more of the computers is out of synch regarding the VIN and/or SIR ID, Your SIR warning is illuminted and you do not have the protection of the airbag system as it is DISABLED with a B1001. If you want working airbags you need to get this fixed. If you are certain that the three computers are the originals in the car, then the SDM needs to be replaced. You will need a Tech2 to determine what the computers have set in them to be certain they are correct.

The broken plug wire will DEFINATELY cause the engine to miss.

 

How do I find out what code has been set? (My Check Engine" light is on)

Is there a list somewhere of the codes and what they mean?

How do I clear a code?

TIA
Thom

 

Here you go:

https://www.corvetteforum.com/techti...D=26&TopicID=1

 

That is not an EVAP hose, it's part of the PCV system, all of the EVAP hoses are the rigid plastic lines.