One of the most common (and inconvenient) problems with the Mazda MX-5 is when it has no heat coming from the heater. Not having a functioning heater makes driving much less comfortable, and can be a sign of certain issues. At the simplest level, there are two main reasons why the heater is not … Read more
P0405 is a generic OBDII trouble code. It deals with the signal coming from the EGR system. Since it is a generic code, it has the same meaning for the Mazda MX-5 as it would any other vehicle. The EGR system allows a certain amount of the MX-5’s exhaust to re-enter the combustion chamber, … Read more
P0431 is a standard OBDII trouble code, which means that it has the same meaning for the Mazda MX-5 as it would any other vehicle. It is closely related to P0430 (which is one of the most popular OBDII codes). Warm Up Catalyst Efficiency → Below Threshold (Bank 2) When it’s the only trouble code … Read more
P0421 is a relatively rare OBDII trouble code. It’s generic, which means it has the same definition for the Mazda MX-5 as it would any other vehicle. It is technically defined as “Warm Up Catalyst Efficiency → Below Threshold (Bank 1)”. In layman’s terms, it indicates that your Mazda MX-5’s catalytic converter is not scrubbing pollutants efficiently … Read more
P0411 is a general OBDII trouble code, which means that it has the same meaning for the Mazda MX-5 as it would any other car or truck. By definition, the code is letting you know that the ECM has detected incorrect flow in the secondary air injection system. P0411: Secondary Air Injection System → Incorrect … Read more
A relatively common, yet difficult to diagnose OBD-II trouble code is P0316. It has the same meaning for the Mazda MX-5 as it would any other vehicle. It indicates that there is a misfire at the startup of the vehicle, and that it happens within the first 1000 revolutions of the engine. P0316: Engine Misfire … Read more
P0740 is one of the most common transmission trouble codes. It means that the MX-5‘s computer has detected that there is an issue with the torque converter clutch (TCC) solenoid circuit. P0740: Torque Converter Clutch Circuit Malfunction The TCC “locks” the drivetrain, which allows for a true mechanical connection between the transmission … Read more
P0160 is a standard OBDII trouble code. It has the same meaning for any vehicle with OBDII, including the Mazda MX-5. When a vehicle has P0160, the PCM/ECM is not detecting any activity from the sensor. It doesn’t mean that the O2 sensor isn’t getting power, but that the voltage isn’t changing, which is … Read more
P0118 is a common OBDII trouble code. It is a general code, which means that it’s going to have the same meaning for the Mazda MX-5 as it would any other vehicle. P0118: Engine Coolant Temp Sensor Circuit → High Input This code is thrown when the resistance coming from the coolant temp sensor … Read more
P0410 is a generic OBDII trouble code. This means that it has the same meaning for the Mazda MX-5 as it would any other vehicle. It is letting you know that there is an issue with the secondary air injection system. P0410: Secondary Air Injection System → Malfunction The secondary air injection system injects air … Read more