The P0475 indicates an Exhaust Backpressure (EBP) Control performance concern. Monitor the exhaust backpressure reading Key On Engine Off (KOEO) and at idle. This value should be equivalent to atmospheric pressure. A typical reading at sea level would be 14.6-14.8 PSI.
Monitor for an increase under load to see if increases, not to exceed approximately 35 PSI. If no increase is noted, check/replace the sensor and exhaust supply tube for carbon restrictions and recheck for proper operation.
This will not cause your misfire.
If you are feeling really ambitious you can pull both valve covers off and disconnect the injectors, one by one, with the engine running. You are looking for the one that doesn't change the way the engine runs, or has the least effect on it.
Kinda a crude way to do it, but gets the job done.
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Fri, September 24th, 2010, 03:49 PM
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