1997 Villager check engine light is on

[mech5357]

I used tester from Auto Zone, It says I have four codes. Po400/Po325/Po136/Po325. Does anybody know if there is one sensor that kick outthese codes.

[IH8SPM]

Originally Posted by mech5357

I used tester from Auto Zone, It says I have four codes. Po400/Po325/Po136/Po325. Does anybody know if there is one sensor that kick outthese codes.

po400 egr code-check for bad hose.
po325 knock sensor- ignore this one
po136 o2 sensor downstream- replace both likely front sensor bad
and you repeated the last onw.

You have about 100 bucks and 1 hour of your own time to have this fixed at most. The majority of the 100 is for the o2 sensor the egr thing is less than a buck. look up a recent thread I posted in for egr and knock sensor.

[emd2423]

I had a similar situation on my '99 Villager Estate. AutoZone pulled the codes:

P0135 - O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0325 - Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor)

The P0325 came up twice and I understand the significance of this code based on reading other posts in this forum.

My question - Does the P0135 code refer to the O2 sensor before the catalytic converter and where is it located? Would a Haynes repair manual indicate where the O2 sensors are located?

[IH8SPM]

Originally Posted by emd2423

I had a similar situation on my '99 Villager Estate. AutoZone pulled the codes:

P0135 - O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0325 - Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor)

The P0325 came up twice and I understand the significance of this code based on reading other posts in this forum.

My question - Does the P0135 code refer to the O2 sensor before the catalytic converter and where is it located? Would a Haynes repair manual indicate where the O2 sensors are located?

The bank one sensor is the front sensor which can be seen from under the hood in front of the lower radiator. You can also just reset the codes and unplug the front sensor and if you get the same code then its verified but I am pretty sure its the front one