C284A Diagnostic Trouble Code

C284A 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 C284A diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
Hesitation upon acceleration

Possible Causes :

Some aftermarket accessories and performance modifications
A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Faulty IMRC actuator/sensor

Repair Processes :

Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. 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 C284A 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 C284A.

Fortunately, C284A is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C284A Trouble Code For Specific Cars

C284A Talbot 95 Mirror Passenger Horizontal Feedback Potentiometer Circuit Short to Battery
C284A Chrysler Crossfire Engine Speed Input Circuit Range/Performance
C284A Mercedes Sl 55 Air Bag Crash Sensor #2 Feed/Return Circuit Short To Ground
C284A Borgward 2.3 Litre Control Module VSS Output "A" Malfunction
C284A Buick Xp-300 Damper Low Side Rear Circuit Failure
C284A Mercedes-benz B Class Air Bypass Valve System
C284A Mazda Capella Transmission Transfer Case Differential Lock-Up Solenoid Circuit Failure