po430 code 04 fx4 150
Senior Member
Joined: Oct 2002
Posts: 7,295
Likes: 125
From: St. Louis (Out in the woods)
Downstream sensors do not cause catalytic converter efficiency codes.
Either the pre-cat is bad or there is something else causing an excess of fuel to be dumped into bank 2's exhaust.
Either the pre-cat is bad or there is something else causing an excess of fuel to be dumped into bank 2's exhaust.
Senior Member
Joined: Oct 2002
Posts: 7,295
Likes: 125
From: St. Louis (Out in the woods)
Proper diagnosis is needed to avoid more swapping of parts that don't fix it.
Since it's obvious that the diagnostic procedure is probably over the head of the OP, take it to a qualified mechanic who can look at the upstream vs downstream switching rates on a graphing scan tool.
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Junior Member
Joined: Feb 2011
Posts: 3
Likes: 0
Maybe, maybe not.
Proper diagnosis is needed to avoid more swapping of parts that don't fix it.
Since it's obvious that the diagnostic procedure is probably over the head of the OP, take it to a qualified mechanic who can look at the upstream vs downstream switching rates on a graphing scan tool.
Proper diagnosis is needed to avoid more swapping of parts that don't fix it.
Since it's obvious that the diagnostic procedure is probably over the head of the OP, take it to a qualified mechanic who can look at the upstream vs downstream switching rates on a graphing scan tool.