H48 on a 94 LT1?

[Paul Higg]

Can anyone tell me where in the FSM the code H48 is? I looked through the entire FSM and I cannot seem to find what H48 means. Junk says it was a "miss" but I'd like to see it in black & white. I trust Junk, it's just that I wanna see it.

Thanks.

Paul

 

[gmjunkie]

Can anyone tell me where in the FSM the code H48 is? I looked through the entire FSM and I cannot seem to find what H48 means. Junk says it was a "miss" but I'd like to see it in black & white. I trust Junk, it's just that I wanna see it.

Thanks.

Paul

I haven't a Clue why it's not in the FSM!!But this is out 1 of the Reference books that came with 1 of my scanners!!
The H stans for History,Meaning that it has done it,but is not doing it Now!! 48= Misfire Symptom, meaning Misfireing on 1 or more cyclinders!!

 

[Paul Higg]

Junk, I JUST found it. It is because I ran it without the air bridge containing the MAF. It is totally normal to set this DTC if the MAF is disconnected.

Thanks for your help. I was JUST about to post what I found when you posted first.

I appreciate all your help.

Paul

 

[Rabbit]

Can anyone tell me where in the FSM the code H48 is? I looked through the entire FSM and I cannot seem to find what H48 means. Junk says it was a "miss" but I'd like to see it in black & white. I trust Junk, it's just that I wanna see it.

Thanks.

Paul

Book 2.....Driveability & Emissions Vin P, Page 6E3-A-101

DTC 48 Maf sensor circuit.

 

[Paul Higg]

Thanks Rabbit, I found it. It was because I had the air bridge out with the MAF disconnected while I ran the engine.

Thanks.