Code PCM: ECU fault codes - causes, symptoms, and solutions

Air-Fuel Mixture & Sensors ECU fault codes ECU, Electrical & CAN Emission Control Engine Sensors & Timing

Code P0137: full description, causes, and solutions

17.03.2026 Daniel Brooks

The information provided is general and does not replace professional consultation. Code P0137 is one of the most common OBD-II codes indicating low voltage in the rear oxygen sensor circuit…

ECU fault codes Fuel System Ignition & Misfire

Code P0306: what the code means, explanation, and causes of misfire in cylinder 6

05.03.2026 Daniel Brooks

Error P0306 is an OBD-II DTC indicating a misfire in cylinder number 6. The PCM detects irregular crankshaft speed variation corresponding to the sixth cylinder, triggering the Check Engine light;…

ECU fault codes Fuel System Ignition & Misfire

Code P0305 (DTC P0305): what it means, causes, and how to fix misfires in cylinder 5

03.03.2026 Daniel Brooks

Code P0305 is an OBD-II code indicating that the PCM has detected misfires in cylinder 5. When this code appears, the engine typically runs rough, power decreases, and the Check…

ECU fault codes ECU, Electrical & CAN Emission Control Fuel System

Code P1450: what it is, causes, diagnosis, and repair

27.02.2026 Daniel Brooks

Briefly: P1450 is a diagnostic trouble code (DTC) indicating a problem bleeding vacuum from the fuel tank (EVAP system). It often appears as a check engine light and refueling difficulties…

Air-Fuel Mixture & Sensors ECU fault codes ECU, Electrical & CAN Emission Control

Code P0135: what it means, causes, and how to fix it yourself

27.02.2026 Daniel Brooks

Code P0135 is a diagnostic indicator that the oxygen sensor heater circuit for Bank 1 Sensor 1 is not functioning as expected by the PCM. The sensor located before the…

Air Intake & Throttle Air-Fuel Mixture & Sensors ECU fault codes ECU, Electrical & CAN

Code P0106: meaning, causes, symptoms, and how to fix it

27.02.2026 Daniel Brooks

Code P0106 indicates an incorrect signal from the manifold absolute pressure (MAP/BARO) sensor, affecting fuel calculation and engine operation. Below is a quick overview, step-by-step diagnostics, and solutions from simple…

ECU fault codes ECU, Electrical & CAN Emission Control Fuel System

Code P0440: what it means, all causes, and how to fix it yourself

26.02.2026 Daniel Brooks

Code P0440 is a generic diagnostic trouble code (DTC) indicating a problem in the evaporative emission control system (EVAP). When the engine control module (ECM) registers DTC P0440, it means…

Air Intake & Throttle Air-Fuel Mixture & Sensors ECU fault codes

Code P0507: diagnosis, causes, and solutions

26.02.2026 Daniel Brooks

P0507 – idle speed higher than normal. The engine control module registers this code when the actual idle speed consistently exceeds the target range (usually 600–900 rpm for gasoline engines).…

ECU fault codes ECU, Electrical & CAN Emission Control Fuel System

What does error code P0449 (DTC P0449) mean and how to fix it?

26.02.2026 Daniel Brooks

Code P0449 is an OBD-II diagnostic trouble code indicating a fault in the EVAP (Evaporative Emission Control System) vent valve control circuit. The ECM records P0449 when the control signal…

ECU fault codes Emission Control Fuel System

Code P0446: meaning, causes, symptoms, and how to fix it

25.02.2026 Daniel Brooks

When the Check Engine light illuminates on the dashboard, most car owners feel concerned. Has something broken? Is it safe to keep driving? The P0446 code can be particularly confusing,…

Category: ECU fault codes

You missed