Question about 2001 Mazda MPV
Yes there are 4 sensors, one on each bank of your V6 above the catalytic converter and also a pair below the cats, maybe you should find an independent garage to put the Mazda on their code reader and find out the whole picture, my reader cost $300 and is low end but gives all the info on each O2 sensor (and all other sensors) in real time so I can see how many are going off spec and need changing. Dealerships work to manufacturers reccomendations and guidelines so probably have to change the pair.
Posted on May 02, 2010
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Posted on Jan 02, 2017
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P0141....O2 Sensor Heater Circuit (Bank 1 Sensor 2)
P0142....O2 Sensor Circuit Malfunction (Bank 1 Sensor 3)
P0143....O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3)
P0144....O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)
P0145....O2 Sensor Circuit Slow Response (Bank 1 Sensor 3)
P0146....O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 3)
P0147....O2 Sensor Heater Circuit (Bank 1 Sensor 3)
P0340....Camshaft Position Sensor 'A' Circuit (Bank 1 or Single Sensor)
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