Question:
I have a 2003 Suzuki xl7, O2senser problem, service engine soon light came on, it read #1, o2sensor circuit, no activity, bank 1 sensor 1 po#134 mod$0i #2 po134 o2 sensor no activity, bank 1 sensor 1, able to clear, but it comes back on in about 30 to 40 miles
Answer:
Not much diagnosing can be done without having a scan tool that can read the data from the oxygen sensor but, the oxygen sensor is more than likely not responding to the oxygen content in the exhaust and the only repair is to replace it but first make sure all fuses and the oxygen sensor relay is good, you can just swap the relay with another on, also unplug the sensor and make sure you have 12v and ground going to it, if so replace the sensor. the number 1 oxygen sensor is the one before the catalytic converter.
