C1408 Diagnostic Trouble Code

C1408 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 C1408 diagnostic trouble code may include:

Misfire
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Hesitation upon acceleration

Possible Causes :

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.
Dirty air cleaner element Damaged DPF
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code C1408 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 C1408.

Fortunately, C1408 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1408 Trouble Code For Specific Cars

C1408 Cadillac Bls Data Mismatch #2 (receive data does not match what was expected)
C1408 Marcos Ts Transmission 4-Wheel Drive High Indicator Short Circuit To Ground
C1408 Isuzu I-290 SCP (J1850) Invalid or Missing Data for Tires
C1408 Jeep Cj2 Seat Driver Rear Down Switch Circuit Short To Battery
C1408 Ginetta G3 Open Power To Ground VCRM
C1408 Jaguar Xjr Seat Driver Occupied Input Circuit Short To Battery
C1408 Rover P5 Ignition Control (IC) Circuit Low Voltage