BMW Werkz banner
B

Reaction score
0

Marketplace Rating
(0.0 - 0 reviews)

Profile posts Latest activity Discussions Buy & Sell Reviews About

  • · Registered
    Joined
    ·
    2,192 Posts
    P0203 means that the PCM detected a fault in the injector or the wiring to the injector. It monitors the injector and when the injector is activated, the PCM expects to see the voltage pulled "low" or close to zero. When the injector is switched off, the PCM expects to see a voltage that is close to battery voltage or "high". If it doesn't see the expected voltage the PCM will set this code. The PCM also monitors resitance in the circuit. If the resistance is excessively low or high it will set this code

    Check for voltage at the fuel injector connector. It should have 10 volts or more. . If you have access to an injector tester, activate the injector and see if it operates. If the injector operates, then you likely have either an open in the wiring, or a blocked injector. If the code changes, then change the injector. At the PCM, remove the driver wire from the PCM connector and Ground the wire.
  • Loading…
  • Loading…
  • Loading…
  • Loading…
  • Loading…
Top