I have a 97 dodge van 5.2L 2 trouble code came up.

The van started to buck and back fire.

P0171 Soleniod circuit range performance bank 1

P0300 muilt cylinder misfire

I was looking at the operation data and i found that 1 of the o2 senors was only read .200volts and not fluctuating.

If iam think correctly the O2 is bad and reading lean and the computer is riching the mixture to compensate.

I am i correct or should i be looking some where else.

Thanks

Cyl. misfire will cause an O2 to read lean(not burning the O2) as will a vacuum leak(excess O2)check secondary ignition, etc first to locate misfire issue.