GMC Truck Forum banner

1 - 4 of 4 Posts

·
[>
Joined
·
3,255 Posts
Discussion Starter #1
Scanned the computer a few minutes ago and got 2 trouble codes. Could be from when I ran to the exhaust shop with open headers so I cleared them and hopefully they will not return.

P0137
P0300


Can someone with more engine experience tell me what those 2 codes are saying, What the cause could be, (if it was driving like I said above)
And if it comes back on How do I fix the problem?
 

·
Registered
Joined
·
36 Posts
Your O2 sensor after the cat is either bad, or your cat is starting to go. This is for P0137. P0300 means the engine has detected misfires, could be time for a tune up (plugs, wires) ... it is a stock cam, correct?
 

·
[>
Joined
·
3,255 Posts
Discussion Starter #4
Yea Stock cam.

Maby it got tripped when I drove it with open headers?

I reset it for now ill check it again in a couple days or a week or so.

The thing Is my buddy hooked it up to his OBDII scanner he took home from work over the weekend and it showed 0 coded or pending codes. Said it was running a little lean though ?????

But I have not driven it sence he scanned it and I hooked it up to reprogram with the HPPIII and it showed those two codes?
 
1 - 4 of 4 Posts
Top