When this P0205 starts flashing in your dash, it means the injector cylinder #5 circuit malfunction. As you will know, each injector has 2 terminals; namely the power source and the ground supply. The power source can come from a fuse, relay while the ground supply is almost always supplied by the engine computer (ecm). When any of these 2 wires are shorted or open, this P0205 code will come. Besides from the mil light coming on, other symptoms could be misfiring, cutting off and hesitation.

The first thing to do when checking this P0205 code is to check the wiring harness leading to the injector circuits. This is important specially if the harness wires are exposed to heat, oil and bad routing. On some Asian models, this problem is so common that the injector wires are replaced regularly by the dealer whenever this code appear. On the other hand, domestic engines will cause this code when there is failure in the tps sensor. This is evident if the symptom is accompanied by hesitation and could be tested by wiggling the tps wires during idle and the bad symptom will re-appear. When confirmed, this problem is fixed by replacing the tps sensor.

If after doing all of these recommended repairs and the fault code re-appears, it is possible that the ecm itself is at fault. This can be checked by testing the ecm terminal pins for battery and ground supply. When performing all these tests, it is assumed also that the injectors are tested for correct resistance and basic tune up check ups done.

Thanks!

This entry was posted on Monday, March 31st, 2008 at 5:07 am and is filed under Check Engine Light FIXES. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.