'94 emission codes
Thread Starter
Pro
Joined: Oct 2012
Posts: 672
Likes: 2
From: Cheltenham, England
'94 emission codes
Ive just done a routine check for any codes that may have occurred recently and I'm getting the following:
PO133 BANK 1 HO2S SLOW RESPONSE
PO135 BANK 1 HO2S HEATER CKT
PO420 BANK 2 CATALYST MONITOR FAULT
P1133 BANK 1 HO2S SWITCH FAULT
The two O2 sensors on the right bank were renewed a year ago but the left one wasnt, I have our annual safety check due and Im planning to replace the cats before that anyway, last year the emissions were borderline and that was just after the sensors were replaced, would renewing the cats and the left hand sensor put things right or is there anything else that needs doing?
PO133 BANK 1 HO2S SLOW RESPONSE
PO135 BANK 1 HO2S HEATER CKT
PO420 BANK 2 CATALYST MONITOR FAULT
P1133 BANK 1 HO2S SWITCH FAULT
The two O2 sensors on the right bank were renewed a year ago but the left one wasnt, I have our annual safety check due and Im planning to replace the cats before that anyway, last year the emissions were borderline and that was just after the sensors were replaced, would renewing the cats and the left hand sensor put things right or is there anything else that needs doing?
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
A rule of thumb is that all O2s should be replaced at the same time. Much like spark plugs.
As for the cats, how many miles on the car? OEM cats run past 125k miles...
PS: My Mom is from Ipswich.
As for the cats, how many miles on the car? OEM cats run past 125k miles...
PS: My Mom is from Ipswich.
Thread Starter
Pro
Joined: Oct 2012
Posts: 672
Likes: 2
From: Cheltenham, England
You know what, I bought the car not very far from Ipswich!!
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Small world society!!!
70k the cats SHOULD be ok. Unless they got leaded fuel in them, but the EU banned that stuff 20+ years ago.
The LT1 is prone to pops and such on deceleration. But the Corsa system is sooo nice.
I would check the O2s...
70k the cats SHOULD be ok. Unless they got leaded fuel in them, but the EU banned that stuff 20+ years ago.
The LT1 is prone to pops and such on deceleration. But the Corsa system is sooo nice.
I would check the O2s...
