C0174 Diagnostic Trouble Code

C0174 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 C0174 diagnostic trouble code may include:

Carbon Buildup on O2 Sensor
Malfunction Indicator Lamp (MIL) illuminated
Hesitation upon acceleration
Reduction in engine performance, especially at low RPM levels

Possible Causes :

Dirty air cleaner element Damaged DPF
A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.
Some aftermarket accessories and performance modifications

Repair Processes :

If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs. 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.

Process Tips

Diagnostic trouble code C0174 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 C0174.

Fortunately, C0174 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0174 Trouble Code For Specific Cars

C0174 Lamborghini Miura Solar Radiation Sensor Circuit Open
C0174 Skoda Yeti Lack Of HO2S22 Switch - Sensor Indicates Rich
C0174 Nissan Fuga Clutch Position Fault
C0174 Infiniti Fx30
C0174 Austin Allegro Autolamp Sensor Input Circuit Failure
C0174 Rover Ccv Ignition Coil F Primary/Secondary Circuit Malfunction
C0174 Oldsmobile Delmont Cylinder 8 Injector Circuit Low