check engine light

Year/Make/Model: 2009 Mazda Mazdaspeed 3 Mileage: 87,000 Location: Colorado Concern: Check engine light, nothing seems to be affected to the car while driving from what i can tell. Gas mileage is lower than normal. DTC's: P0134 O2 sensor circuit no activity detected bank 1 sensor 1, P2246 O2...

Hi, I just wanted to hop on here because I currently have a check engine light on a 2009 Mazdaspeed 3 with 87,000 miles on it reading with the codes P0134,P2246,P0031,P0032. The car currently has a catless down pipe with a high flow cat after the second O2 sensor, not sure what exhaust it is...

Hey guys! So ive been dealing with this misfire for a while now and cant seem to find whats causing it. Symptoms are lots of backfiring and hesitation under load about all rpms after 2000. We've checked coil packs, spark plugs, compression (which is good), mass airflow sensor, and swapped the...

Alright so I know there’s a few threads on here about this but I haven’t seen anybody with my direct circumstance. Long post incoming… Permanent Code P0012 I have a fresh built engine that had been built by a reputable shop. Mazda OEM VVT kit was installed at the time of build. I’m...