Mazda 3 P0203:  Injector Circuit Malfunction  | Cylinder 3

  P0203 is a common OBD2 trouble code.  It means the third cylinder in the firing order has a fuel injector that is malfunctioning.  It’s generic code, which means that it means the same thing for the Mazda 3 as it would for any other vehicle. When the PCM sees that the voltage from cylinder … Read more

Mazda 3 P0201:  Injector Circuit Malfunction  → Cylinder 1

P0201 is one of the more common OBD-II trouble codes.  It indicates that the first cylinder in the firing order has an injector malfunction.  It’s generic, which means that it has the same meaning for the Mazda 3 as it would for any other vehicle. When the PCM sees voltage at cylinder 1 that is … Read more

Mazda 3 P0015: “B” Camshaft Timing  → Over Retarded

  P0015 is a generic OBD II trouble code. It affects vehicles with variable valve timing (VVT). The list of VVT vehicles is growing, and the Mazda 3 can have VVT, and is known to develop this code. VVT changes the frequency and distribution of gases entering and exiting the combustion chamber. It allows the … Read more

Mazda 3: High Oil Pressure → Causes + Diagnosis

If your Mazda 3 is experiencing unusually high oil pressure, you need to find out what’s causing it right away. Unusually high oil pressure can indicate serious problems, such as a blocked oil passage, or a broken pressure relief valve.  It should be treated like you have no oil pressure until you verify what is … Read more

Mazda 3 P0606:  ECM/PCM → Processor Fault

P0606 is a generic OBD II code.  Which means that it has the same meaning for the Mazda 3 that it would for any other vehicle.  If your 3 has P0606 it’s highly likely that the ECM/PCM (engine or powertrain control module, they mean the same thing) has failed. The PCM regularly performs a self … Read more

Mazda 3 P0603: Keep Alive Memory → Error

P0603 is a generic OBD2 trouble code.  It indicates that your Mazda 3’s keep alive memory has had an error. Keep alive memory is the data that your 3’s PCM (Powertrain Control Module) has learned about how your engine conditions.  All of this sensor and driving input data is used to keep it operating efficiently. … Read more