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-   -   2 Trouble Codes. What do I do now? (https://www.gmforum.com/2000-2005-90/2-trouble-codes-what-do-i-do-now-267532/)

ColoBonne 11-07-2007 12:14 PM

2 Trouble Codes. What do I do now?
 
SES light went on last night after a stop and was blinking the entire way home.
Pulled the codes and am not sure what to do since I don't have a factory service manual yet.
Codes were:
P0205 injector circuit malfunction cylinder 5
P0305 Cylinder 5 misfire detected

Will pull the plug and check the plug wire for the misfire problem, but not sure what else to do beyond that.

BillBoost37 11-07-2007 01:00 PM

When you pull the plug, put a small bulb in it...like an old side marker pinch bulb with the tabs pulled down to fit in the connector and look for it blinking. If it blinks then most likely your injector has failed.

Archon 11-07-2007 03:27 PM

If it turns out to be an injector problem, check the wiring to it. Critters like to crawl up there and chew on the wiring.

ColoBonne 11-08-2007 01:31 AM

No critters have gotten to the wiring.
Pulled the spark plug and it looks wet. Is this an injector problem, an ignition problem or both? Where should I start troubleshooting?

BillBoost37 11-08-2007 07:11 AM

Oopsie. In the below..I was assuming you were pulling the injector connector.

This test will tell you if the problem is in the wiring or with the injector. Blinking means the injector should be pulsing (Injector is the problem) and solid means the wiring is the problem. ;)


Originally Posted by BillBoost37
When you pull the plug off the injector, put a small bulb in it...like an old side marker pinch bulb with the tabs pulled down to fit in the connector and look for it blinking. If it blinks then most likely your injector has failed.



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