O2 problem, car has BIG miss
Thread Starter
Teching In
Joined: Dec 2004
Posts: 25
Likes: 0
O2 problem, car has BIG miss P0161 & P0300 My car has sat several weeks. Now it has a huge miss. We ran the codes on a Delphi system and it said the back bank 2 O2 heater malfunction. It also says multi cylinder miss-fire. The long trim was +15 on one bank and -8 on the other. I replace the O2 and the problem is still there. I used a heat guage for exhaust temps and one side is MUCH colder than the other. HELP PLEASE!!! 
Last edited by TDSRacing; Feb 24, 2005 at 10:35 AM.
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
what are the exact codes? "back bank 2 O2" sounds like passengar rear to me.... which won't have an effect on driving
if EGT is so much higher on 1 side ... I would check those injectors... possibly clogged
what kinda car? year/make/mods
if EGT is so much higher on 1 side ... I would check those injectors... possibly clogged
what kinda car? year/make/mods
Thread Starter
Teching In
Joined: Dec 2004
Posts: 25
Likes: 0
Originally Posted by horist
what are the exact codes? "back bank 2 O2" sounds like passengar rear to me.... which won't have an effect on driving
if EGT is so much higher on 1 side ... I would check those injectors... possibly clogged
what kinda car? year/make/mods
if EGT is so much higher on 1 side ... I would check those injectors... possibly clogged
what kinda car? year/make/mods
Code DTC P0161 & P0300
Bank 2 had the 17.19 short fuel trim
other side 1.56
I'm guessing that the front O2 on bank2 is bad and not reporting accurately. Thus, you are injecting a lot more fuel, and that bank will be considerably colder than bank1.
