What voltages should be present on the idle air control valve connection in a 5.9l?
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What voltages should be present on the idle air control valve connection in a 5.9l?
I keep getting check engine light with the error code P0505. The truck idle is fine
and there are no vacuum leaks. So far I have cleaned the throttle body, checked intake manifold for excessive oiling/plenum gasket leak, checked the charging system, and replaced the valve. I have checked wires to pcm and iacv for shorts, continuity and voltage. After clearing the code it pops back sometimes immediately on restarting the engine, some times before starting, after turning to run, and other times it has remained ok for 50 miles or a day of driving. On each of the four terminals to the IACV the voltage oscillates between ~13 and 0 volts. What are the expected voltages?
and there are no vacuum leaks. So far I have cleaned the throttle body, checked intake manifold for excessive oiling/plenum gasket leak, checked the charging system, and replaced the valve. I have checked wires to pcm and iacv for shorts, continuity and voltage. After clearing the code it pops back sometimes immediately on restarting the engine, some times before starting, after turning to run, and other times it has remained ok for 50 miles or a day of driving. On each of the four terminals to the IACV the voltage oscillates between ~13 and 0 volts. What are the expected voltages?
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Joined: Aug 2024
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I have the same problem, did you finally get it resolved…ive replaced the eco several IACV, O2 SENSORS,plug going to the tb, checked wires for continuity
so frustrated, want to sell vehicle but need code gone
help please
2000 3500 dodge ram van, 5.9
so frustrated, want to sell vehicle but need code gone
help please
2000 3500 dodge ram van, 5.9
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Joined: Apr 2010
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From: Clayton MI
Getting a P0505? Then I would suspect a failed PCM.
