P0200 - FUEL INJECTOR CIRCUIT MALFUNCTION

When the vehicle has fuel injection in sequences, the PCM (Power Train Control Module) controls each injector individually through a controller. The PCM supplies the ground circuit to each of the injectors. In addition, each of these circuits is monitored by the vehicle’s computer in search of faults.

When the PCM commands an injector to shut off, it expects to see a high voltage in the controller’s ground circuit. On the other hand, when the injector is instructed to turn on, it expects the voltage in the controller circuit to be low. If the PCM does not observe these expected conditions in the controller circuit, the DTC code P0200 OBDII is stored.

• Illuminated malfunction light (Check engine).
• The engine may not start.
• The engine may start and stop.
• Misfiring.
• Inestability in idle.

The factors that lead to the establishment of the diagnostic code P0200 OBD2 are:

• A fuel injector may be short.
• The resistance of one of the injectors can be low.
• Controller circuit may be shorted to voltage or ground.
• Defective wiring harness causing a short circuit.

To solve the problems of the P0200 OBDII fault code you must do the following:

• Check the cables that lead to the fuel injector. If you find that one of these has wear or defects, you should repair it or change it if necessary.
• Make sure the electrical connections are correct. Change any component that is defective.
• Change the fuel injector.