2000 Dodge Neon oxygen sensors

2000 DODGE NEON
249,700 MILES • 4 CYL • FWD • MANUAL
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RUSSHA686
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i have a 2000 chrysler (dodge) neon 2.0 litre sohc, 5spd.
check engine light is on
i did the ignition key (on-off-on-off-on-off) trick
the following codes displayed themselves
P0134
P0135
P1684
i was wondering which of the oxygen sensors should i replace first
or should i just replace both before and after the catalyst converter and be done with it
Jul 25, 2008 at 12:21 AM
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SERVICE WRITER
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  • ASE Certified Mechanic
The first two codes are both related to the front o2.

The last one sounds like a communication error of some sort, but I don't have info on that one.

You can have the O2 scoped, but it might be the same cost to just replace it.

I would do a carbon cleaning on the engine first if it were mine.
Jul 25, 2008 at 5:46 AM
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