I bought this car as my first car like 5 months ago. I was quite happy with the drive but now I feel that it limits the engine. I have my service light on and the following OBDII codes. According to the Scotty's videos and some other content out there, I am thinking to do 3 things but I am not sure if they'd be right. Those three things are cleaning the MAP sensor, cleaning the injectors via shorting the fuel intake with cleaning liquid, adding lacquer thinner to the fuel tank. But after seeing those OBDII codes I freaked out a bit 🙂 The car usually fails to show the speed at the first run. If I turn it off and on again then speedmeter starts to work back. Such electrical weirdnesses happens. I see that codes show high circuit on BARO but I am not sure what to do. I am also not sure how to inspect the local mechanic's work so I am a bit afraid to get my car half fixed and thinking that it is completely fixed. Do you have any suggested roadmap for me to follow?
Brand: Mazda
Model: 3
Year: 2004
Engine: 1.4 Benzine (not diesel)
Mileage: 119000 KM (car's history check shows it is right but I cannot guarantee)
Gearbox: Manual
Car Scanner ELM OBD2
DTC report
Selected brand: Mazda
============1==============
P0301
Raw code: 0301
ECU: Engine control unit
Status: Confirmed
OBDII: Cylinder 1 - misfire detected
============2==============
P2229
Raw code: 2229
ECU: Engine control unit
Status: Confirmed
OBDII: Barometric pressure (BARO) sensor - circuit high
============3==============
P0610
Raw code: 0610
ECU: Engine control unit
Status: Confirmed
OBDII: Engine control module (ECM) - vehicle options error
============4==============
P0420
Raw code: 0420
ECU: Engine control unit
Status: Confirmed
OBDII: Catalytic converter system, bank 1 - efficiency below threshold
============5==============
P0301
Raw code: 0301
ECU: Engine control unit
Status: Pending fault present, Pending fault present during this driving cycle, Test conditions are met, Test is inhibited by other DTC, Test has not been completed, Validated and stored in non volatile memory, Validated fault present at time of request, Validated fault has been present during this drive cycle
OBDII: Cylinder 1 - misfire detected
For the P0301 codes, check the fuel injector, ignition coil and spark plug for cylinder 1. Check and see if you are experiencing leaks. I would also look at the wiring for the ECM.
