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2013 Mazda 3



Service Date


Services Performed

  • Brought into shop and checked for faults. Found P0420 cat efficiency, P0301 misfire cylinder 1 and P0731 gear 1 incorrect ratio. Test ran while monitoring fuel pressures. Performed backpressure tests on cats and found rear cat is plugged and front cat seems to be empty as is if it failed and the contents clogged the rear. Both cats need to be replaced before it will be known if further troubleshooting is required for misfire and trans faults.
  • Check under carriage, brakes, exhaust, steering and suspension, tires, visual inspection of engine for possible problems in the future.

Ernie B. gave our service a 5 star review on 1/18/2019