C1404 Diagnostic Trouble Code

C1404 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 C1404 diagnostic trouble code may include:

Poor fuel economy
Possible spark knock (detonation / pre-ignition)
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Look at the plug wires to make sure they are not burnt or laying on the exhaust. It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem.

Process Tips

Diagnostic trouble code C1404 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 C1404.

Fortunately, C1404 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1404 Trouble Code For Specific Cars

C1404 Holden Barina Pedal Forward / Rearward Potentiometer Feedback Circuit Short to Battery
C1404 Mitsubishi Starion B Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)
C1404 Isuzu D-max SCP (J1850) Invalid or Missing Data for Telltales
C1404 Oldsmobile Cutlass Cylinder 8 Injector Circuit High
C1404 Fiat 1200 Kickdown Relay Pull - In Circuit Fault
C1404 Case Jic Door Ajar Lamp Circuit Failure
C1404 Berkeley B Booster Pedal Force switch circuit Failure