Lambda Probe
Mk4 Golf
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Quote: posted by Daz Wilde on 11/04/2005 11:24:36
Recently go this fault 16521 P0137 035
02 sensor circuit Bank1 -Probe 2
Voltage too Low
What is probe 2? is this the probe before the cat?
Any advice is appreciated!
Bank 1 is standard termonology it basically only means anything if it is a V5 or V6 which has two banks and four probes. Probe two is behind the cat.
Recently go this fault 16521 P0137 035
02 sensor circuit Bank1 -Probe 2
Voltage too Low
What is probe 2? is this the probe before the cat?
Any advice is appreciated!
Bank 1 is standard termonology it basically only means anything if it is a V5 or V6 which has two banks and four probes. Probe two is behind the cat.
Strictly speaking, only the 4 motion V5s and V6s have two banks of lambda probes. Hence, all UK-supplied V5s have one bank with two probes.
The fault might just be due to a dodgy connection.
I get the very occasional "slow response" error on probe 2, which seems to make the fuel economy slightly worse until I clear the fault. It's happened once or twice in the last 6 months, so I won't be getting it replaced just yet.
The fault might just be due to a dodgy connection.
I get the very occasional "slow response" error on probe 2, which seems to make the fuel economy slightly worse until I clear the fault. It's happened once or twice in the last 6 months, so I won't be getting it replaced just yet.
So is probe 2 before the cat (meaning the first one nearest to the engine)..... What ive got on now which are meant to be the right ones are parts:
022-906-262-P - before cat
022-906-262-S - after cat
Ive just got the after cat one as what was on mine was for a 4 motion.
I was thinking maybe it was a dodgy wire or connection due to it saying voltage too low?
022-906-262-P - before cat
022-906-262-S - after cat
Ive just got the after cat one as what was on mine was for a 4 motion.
I was thinking maybe it was a dodgy wire or connection due to it saying voltage too low?
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any developments on the above ?
think a pal has same trouble on a V5 bora
cheers, angelo
think a pal has same trouble on a V5 bora
cheers, angelo
On a 4 cyl engine you will only have 1 bank (V6's will have 2 banks for example). Probe 1 is before the cat and is responsible for checking the oxygen content of your exhaust gas to determine fuelling/how the engine's performing (air-fuel mixture).
Probe 2 is after the cat and is used by the ECU to determine the efficiency of the cat. Low voltage is probably due to the probe getting contaminated, take it for a good thrash! It could also indicate that your Cat's not as efficient, but I wouldn't worry 'bout this just yet. As long as it's a constant voltage I wouldn't be too concerned.
Many people wrongly diagnose lambda probes (especially when using VAG-COM), the faults you're displaying look to me like the probes are working correctly.
New probes aren't aged when new or when fitted new! They age as a result of the environment they work in, the ECU will monitor the ageing of the probes (O2 Cross counts) for itself.
Hope this helps.
Probe 2 is after the cat and is used by the ECU to determine the efficiency of the cat. Low voltage is probably due to the probe getting contaminated, take it for a good thrash! It could also indicate that your Cat's not as efficient, but I wouldn't worry 'bout this just yet. As long as it's a constant voltage I wouldn't be too concerned.
Many people wrongly diagnose lambda probes (especially when using VAG-COM), the faults you're displaying look to me like the probes are working correctly.
New probes aren't aged when new or when fitted new! They age as a result of the environment they work in, the ECU will monitor the ageing of the probes (O2 Cross counts) for itself.
Hope this helps.
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