codes, codes and more codes!
#2
I would look into the bank two, upstream o2 sensor. Those codes are all related to that sensor. You may want to just replace it and see what happens. Looks to me like it's probably dead. You could take a look at the wiring first, just to be sure it's not melted to the exhaust or something like that.
It's not likely to have anything to do with the maf. That will normally effect both banks.
It's not likely to have anything to do with the maf. That will normally effect both banks.
#3
I would look into the bank two, upstream o2 sensor. Those codes are all related to that sensor. You may want to just replace it and see what happens. Looks to me like it's probably dead. You could take a look at the wiring first, just to be sure it's not melted to the exhaust or something like that.
It's not likely to have anything to do with the maf. That will normally effect both banks.
It's not likely to have anything to do with the maf. That will normally effect both banks.
#4
I've been able to fix "too lean" codes by finding vacuum leaks and reattaching or clamping vacuum hoses. Most were in SAI system and used small cable ties to clamp because they are easily knocked off doing other maintenance.
Since your 02 code is also fuel ratio related you may want to check for vacuum leaks first.
From D2 manual:
......
Since your 02 code is also fuel ratio related you may want to check for vacuum leaks first.
From D2 manual:
P0150 O2 sensor circuit malfunction (bank 2, sensor 1) Front sensor RH bank stoichiometric ratio outside
operating band
P0174 System too lean (bank 2) Multiplication injector adaptive fuelling - lean limit
exceeded RH bank
P1174 System too lean (bank 2) Additive injector adaptive fuelling - lean limit exceeded
RH bank
operating band
P0174 System too lean (bank 2) Multiplication injector adaptive fuelling - lean limit
exceeded RH bank
P1174 System too lean (bank 2) Additive injector adaptive fuelling - lean limit exceeded
RH bank
#8
A vacuum leak or low fuel pressure can occasionally give you lean codes on one bank. However, both of those problems should give lean codes for both banks. If you have a scan tool with live data, have a look at the fuel trims. If they are both around +20 or +25% then go after fuel or vacuum leaks. Sounds to me like a bad o2 sensor or wiring.
#9
#10
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slanginsanjuan
Discovery I
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03-26-2012 09:00 PM