C0344 Diagnostic Trouble Code

C0344 is a kind of OBD-II Diagnostic C-Chassis Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a C0344 diagnostic trouble code may include:

Carbon Buildup on O2 Sensor
Malfunction Indicator Lamp (MIL) illuminated
Hesitation upon acceleration
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Some aftermarket accessories and performance modifications

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications.

Process Tips

Diagnostic trouble code C0344 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before C0344.

Fortunately, C0344 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0344 Trouble Code For Specific Cars

C0344 Trabant Universal Passenger Sid, Side mount Airbag Low resistance on Squib
C0344 Chrysler Es Evap Emission Control Sys Leak Detected (Gross Leak/No Flow)
C0344 Studebaker Daytona Lamp Turn Signal Right Circuit Failure
C0344 Osca 1600 Door Passenger Reset Switch Stuck Failure
C0344 Ds Ds7 Crossback Ignition/Distributor Engine Speed Input Circuit Range/Performance
C0344 Porsche 959 Fuel Level Sensor B Circuit Malfunction
C0344 Alfa Romeo 2300 ABS Valve Power Relay Circuit Failure