C3143 Diagnostic Trouble Code

C3143 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 C3143 diagnostic trouble code may include:

Diminished fuel efficiency
Fuel pressure too high
Malfunction Indicator Lamp (MIL) illuminated
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
Faulty IMRC actuator/sensor

Repair Processes :

Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. 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. 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 C3143 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 C3143.

Fortunately, C3143 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3143 Trouble Code For Specific Cars

C3143 Mercedes E 200 ABS Power Relay Coil Circuit Failure
C3143 Mercedes S 65 Air Bag Crash Sensor #1 Feed/Return Circuit Short To Ground
C3143 Hyundai Sonata
C3143 Isuzu Axiom SCP (J1850) Invalid or Missing Data for Steering Column
C3143 Mercedes-benz S Class Air Suspension Front Height Sensor High (SE) Signal Circuit Short To Ground
C3143 Chevrolet Deville Driver's / Passenger's Door Ajar Output Circuit Short to Battery
C3143 Kia Towner Servo Motor Airintake Right Circuit Failure