Two codes...need the actual physical location of oxygen sensors
I have two check engine codes for my 1996 Plymouth grand voyager 3.3 engine. PO133 which they said was the Bank 1 sensor 1 and it was the 02 sensor on the header or exhaust manifold and PO140 which they said was the Bank 1 Sensor 2 and it was located after the catalytic converter.
I think I found the one after the catalytic converter but I cannot find the first one. Also, can you give me the chrystler part numbers for these?
Re: two codes...need the actual physical location of...
Pop the hood and look behind the engine in the middle....you'll see o2 sensor on the top of the exhaust pipe unplug it and remove it ............second o2 sensor is located on the same pipe under the passanger seat under the car
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Code 140 is for a problem with the O2 sensor bank one sensor two. This sensor is behind the catalytic converter and tells the computer if the cat is working or not. The code means the sensor voltage has not changed as often as it should. Could be a faulty sensor, wiring harness problem, or other issue. The sensor would need to be tested using a scanner.
The oxygen sensors in front and behind the converter are reporting too similar
Some suggested steps for troubleshooting a P0420 code include:
Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair
Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor
in front of the catalytic converter normally has a fluctuating waveform. The
waveform of the sensor behind the converter should be more steady).
Inspect the downstream heated oxygen sensor (HO2), replace if necessary
these engines have 1 upstream o2 sensor and 1 downstream o2 sensor..the 1 in the rear exhaust manifold is the upstream and the 1 after the converter is the downstream..make sure you replaced the right one
12 is battery disconnected lately, or dead. No worries. 13 & 14 are your likely problem, M.A.P. sensor. 52 is oxygen sensor. I would replace M.A.P sensor, disconnect battery for a few minutes to erase codes, then hook-up start & run the vehicle for a while. My guess is that the oxygen sensor is being tripped by Map sensor. Run for a couple of days if running o.k. then check codes again.