Code PCM: Air-Fuel Mixture & Sensors - 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…

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…

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).…

Air-Fuel Mixture & Sensors ECU fault codes Fuel System

Code P0174: meaning, causes, and how to fix

24.02.2026 Daniel Brooks

Code P0174 is a signal from the PCM indicating that the air-fuel mixture has become too lean on bank 2. Simply put, the engine is receiving more air than necessary…

Air-Fuel Mixture & Sensors ECU fault codes Emission Control

Code P0430: a complete guide to causes, diagnosis, and solutions

23.02.2026 Daniel Brooks

Error code P0430 is a diagnostic trouble code (DTC) indicating that the catalytic converter efficiency on bank 2 of the exhaust system has fallen below the acceptable threshold. The official…

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

Code P0030: meaning, causes, and how to fix it yourself

12.02.2026 Daniel Brooks

Code P0030 indicates a malfunction in the oxygen sensor heater circuit (O2 sensor) before the catalytic converter – Bank 1 Sensor 1. This affects fuel mixture accuracy and emissions. Below…

Air-Fuel Mixture & Sensors ECU fault codes Emission Control Fuel System

Code P0172: meaning, symptoms, causes, and how to fix it (step by step)

11.02.2026 Daniel Brooks

The information provided is general and does not replace professional consultation. “Most people see the P0172 code and immediately think of a faulty oxygen sensor or MAF. But in reality,…

Air-Fuel Mixture & Sensors ECU fault codes Emission Control

Code P0133: meaning, causes, and how to fix it yourself

07.02.2026 Daniel Brooks

Code P0133 indicates a “slow response” from the oxygen sensor (Bank 1, Sensor 1). This impairs fuel mixture control, increases fuel consumption, and can accelerate catalytic converter wear. Below are…

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

Code P0113: meaning, causes, and how to fix it

07.02.2026 Daniel Brooks

OBD-II code P0113 indicates a “high signal level in the intake air temperature (IAT) sensor circuit.” When the control module detects a voltage above 4.91 V for 0.5 seconds or…

Code P0137: full description, causes, and solutions

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

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

Code P0507: diagnosis, causes, and solutions

Code P0174: meaning, causes, and how to fix

Code P0430: a complete guide to causes, diagnosis, and solutions

Code P0030: meaning, causes, and how to fix it yourself

Code P0172: meaning, symptoms, causes, and how to fix it (step by step)

Code P0133: meaning, causes, and how to fix it yourself

Code P0113: meaning, causes, and how to fix it

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Code P0137: full description, causes, and solutions

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Category: Air-Fuel Mixture & Sensors

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