1996 P30 OBD1 w/ OBD2 connector

[jcgribks]

I've got a 1996 Itasca on a P30 chassis w/454 TBI. I have a OBD2 connector but doesn't have all the terminals. I've read that it's really a OBD1 but Chevrolet ran out of connectors and installed a OBD2 connector. I've only got pins 5, 6 & 9, nothing else. My check engine light comes on. I have no way to read the codes. Any idea's without having to take it to the dealer?

Thanks, John

[Daveinet]

Don't know it an issue of running our of connectors, as much as wanting to identify a different standard and baud rate from the older ECMs. When they switched to the 7427 ECM, it was a major advancement in the evolution of computer engine management.

If you want to really read what your engine is doing, you can purchase a connector/adapter here. Yes, you can build one for less than 20 bucks, but time you buy a USB to serial adapter and find one that actually works, you are better off to just buy the complete table.
Download TunerPro RT software here.
Download a datastream definition file, (so the software knows your ECM) here.

[Stim]

A lot of auto parts stores will read the codes for you.

[jcgribks]

I agree I probably have a left over 95 chassis even though my build dates are 4/96 for the p-30 chassis and 6/96 for the Itasca. The 454 tbi was standard and the vortec 454 was an option. But what gets me made about all this is all vehicles built after 1/96 were supposed to be OBD 2 and mines not and for added mess up they ran out of OBD 1 connectors and used the OBD 2 connector but the pins don't match. My OBD 2 scanner doesn't work as the only pins I have are 5, 6 & 9 and a OBD1 scanner won't work on a OBD 2 connector.

[RLS7201]

Hi John,

If you 96 MH is 454 TBI, then it's on a 95 chassis with OBD I. 96 was the first year for the port injected Vortec 454 w/OBD II.
Most OBD II code readers should be backward compatible with you MH.

Richard
Gladstone, MO