Code PCM: Engine Sensors & Timing - 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 ECU, Electrical & CAN Engine Sensors & Timing

Code P0011: what the diagnostic trouble code (DTC) means and how to fix it

25.02.2026 Daniel Brooks

Code P0011 is a diagnostic trouble code indicating that the engine control module has detected excessive advance in the intake camshaft position on bank 1. In simple terms, the ECM…

Cooling System ECU fault codes Engine Sensors & Timing

Code P0128: meaning, causes, symptoms, and how to fix it

24.02.2026 Daniel Brooks

“Over years of experience, I have seen hundreds of P0128 cases, and in most instances, the cause is the thermostat stuck in the open position. However, it is crucial to…

ECU fault codes Engine Sensors & Timing Fuel System Ignition & Misfire

Code P0301: meaning, causes, diagnosis, and how to fix it

11.02.2026 Daniel Brooks

Code P0301 is a signal sent by the engine control module (ECM) to the driver when it detects that cylinder number one is not operating correctly. This is more than…

ECU fault codes Engine Sensors & Timing Fuel System Ignition & Misfire

Code P0304: meaning, causes, diagnosis, and repair of misfires in cylinder 4

10.02.2026 Daniel Brooks

Code P0304 indicates that the ECM has detected misfires in the fourth cylinder — the air-fuel mixture ignited improperly or did not ignite at all. If the Check Engine light…

ECU fault codes Engine Sensors & Timing Fuel System Ignition & Misfire

Code P0303: what it means, all causes, and how to fix it

10.02.2026 Daniel Brooks

Error P0303 is a diagnostic trouble code (DTC) under the OBD-II standard that indicates misfires in the engine’s third cylinder. When the PCM detects this code, uneven combustion or complete…

ECU fault codes Engine Sensors & Timing Fuel System Ignition & Misfire

Code P0302: misfire in cylinder 2 – causes, diagnosis, and repair

09.02.2026 Daniel Brooks

Code P0302 indicates misfires occurring in the engine’s second cylinder. For the PCM, this is a specific event: the crankshaft position sensor has detected that one of the cylinders is…

ECU fault codes ECU, Electrical & CAN Engine Sensors & Timing Ignition & Misfire

Code P0340: meaning, causes, symptoms, and how to fix it

04.02.2026 Daniel Brooks

Code P0340 appears when the engine control module (ECM) detects a malfunction in the camshaft position sensor (CMP) circuit. The sensor transmits the current camshaft position signal, which the ECM…

Air-Fuel Mixture & Sensors ECU fault codes Engine Sensors & Timing Fuel System Ignition & Misfire

Code P0300: a complete guide to causes, diagnosis, and repair

27.01.2026 Daniel Brooks

What to do right now: If the check engine light is flashing, immediately reduce engine speed and stop; flashing indicates active misfires and a risk of catalytic converter overheating. If…

ECU fault codes ECU, Electrical & CAN Engine Sensors & Timing Ignition & Misfire

Code P0335: meaning, causes, diagnosis, and solutions

25.01.2026 Daniel Brooks

The P0335 code appears when the engine control module detects a missing or distorted signal from the crankshaft position sensor. Without this signal, the ECM cannot synchronize ignition and fuel…

Code P0137: full description, causes, and solutions

Code P0011: what the diagnostic trouble code (DTC) means and how to fix it

Code P0128: meaning, causes, symptoms, and how to fix it

Code P0301: meaning, causes, diagnosis, and how to fix it

Code P0304: meaning, causes, diagnosis, and repair of misfires in cylinder 4

Code P0303: what it means, all causes, and how to fix it

Code P0302: misfire in cylinder 2 – causes, diagnosis, and repair

Code P0340: meaning, causes, symptoms, and how to fix it

Code P0300: a complete guide to causes, diagnosis, and repair

Code P0335: meaning, causes, diagnosis, and solutions

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Code P0137: full description, causes, and solutions

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Category: Engine Sensors & Timing

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