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Old Feb 5, 2026 | 04:18 PM
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Normt18101
Joined: Dec 2025
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Default Re: P0410 code check engine light

Thank you zip439 for your response.
Yes, the pump does shut off.
Just a clarification, the readings are just after the pump shuts off. I did find a problem after the readings readings I sent you. There was a broken rubber coupling between the check valve and vacuum line connected to the intake manifold. Replaced it and obviously there was more vacuum. The readings did change just after the pump shut off, the former reading, .465 - .470volts now is .10 - .475 volts, no change on the other. All monitors are set except evap and secondary air, after about 40miles driving, not dtc's. Any ideas now? Your opinion on number of miles to drive to set evap and secondary air. Any test to determine whether switchover valves are working properly (the ones installed were used).

Thanks
Normt18101
 
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