I am getting a DTC 144 on a 2.3 4 cyl. 1996 ranger 5 speed. The check
engine light is on. Auto Zone read the code and reset the check engine
light but came back on. It gets 23 MPG and runs good. The following is
given for that code.
144 (M) Oxygen sensor not switching Single, Right or Rear HO2S - Fuel
How many sensors does it have?
I have bought a FSM wiring manual but don't have the other manual yet. What
should I check for before getting an O2 sensor, and if I replace the sensor
should it be from the dealer or another brand. I have read negative
comments about Bosch sensors. TIA