Do I need a new sensor and which one do I replace(before cat or after)?

Question:
97 dodge grand caravan 3.3L V6-----
codes:
PO134 O2 sensor circuit no activity detected bank1 sensor1-----
P1698 manufacturer specific code-----
not sure which of the two sensors the code refers to.
sure hope its the one after the cat, the other will be a pain to remove

Answers:

Why would headlamps go out twice in 2 months?

Before the cat.,that is sensor one

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How much would it cost to replace a rack and pinion part on a car?

i own a shop,and what the code is referring to is sensor no-1 that's the one before the cat,,and it is a little hard to get to,but will come out a lot easier than you think it will,but that's the one it means,good luck with it.

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Engine bucking?

Oxygen sensor the most nearest to the engine block.. (usually bigger than the other one..)

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