My car shakes

2005 CADILLAC SRX
175,000 MILES • 6 CYL
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MARTELLO L
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  • 2 POSTS
My car just started shaking couple days ago now it is worse. so i went and got it checked. it says code p0306 cylinder six misfire detected and it also says p0455 EVAP system large leak detected. P0206 injector six control circuit. what do all this mean? how long can i drive my car like this? answer need like yesterday. Can i try to clean out fuel injector before replacing it.
Apr 6, 2017 at 10:35 PM
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STEVE W.
  • ✓ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
Check the wiring to the injector and if it is getting the control signals using a noid light. The error you are getting says control circuit. That can be the wiring, connector or injector. Test the parts first.
The misfire should go away once the injector control is repaired.
As for the EVAP leak, have a shop smoke test the system to find the leak.
Apr 7, 2017 at 4:20 AM
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MARTELLO L
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  • 2 POSTS
How do i check the wiring
Apr 20, 2017 at 5:51 PM
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STEVE W.
  • ✓ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
Using a noid light (can be rented/borrowed from many parts stores.) You just unplug the injector, plug in the noid light and see if it flashes. You can also do this with a test light but then you need a helper to turn the key as you hold the light.

If you connect the light, start the engine and see no flashing, you need to trace the injector wire back to the PCM, OR back probe the wire at the PCM and test there.
If no signal there you need a replacement PCM and to have it programmed.

If you connect the light and it is flashing then the injector has an issue.
Apr 20, 2017 at 9:37 PM
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