Mazda Repair Questions? Ask Mechanics for Answers ASAP
Welcome, I'm Chris (aka Moose) I prefer to work when others don't, I am here around lunch and after dinner till after midnight.
Do you recall the code numbers that were stored?
Does this 2-3k rpm acceleration concern occur in all gears?
0032 means there is a concern with the upstream O2 sensor heater. If this is a current code and the sensor has been replaced then the wiring or computer is to blame for this code.
0134 if this code as well is current then its going to be a cheap aftermarket AFR sensor used or a wiring concern to this sensor.
Concerns with sensors that regulate the air fuel ration can cause the hesitation issue your getting. Do you run a oil charged air filter? If so it could be depositing oil onto the air intake sensor prior to the throttle body. Will your scan tool show fuel trims so we can do some testing? Has the PCM been updated?
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Have any of the diag steps for these codes been done to confirm the sensor replacement is the required fix and to confirm its not the other possible causes I mentioned?
Use these links.
Hello again Chris here,