So, you had a code P0013 and changed the intake solenoid? That is the code for the exhaust solenoid control circuit. Or did you mean to say you did both?
The C0800-07 code is Device Power 1 Circuit Voltage Above Threshold That means it detected a voltage above 18 volts for more than 5 seconds. The odd thing is that it was only one code for one device. However, the test would be the same, use a meter to test the voltage at the battery with the engine off, with a good battery you should see between 12.4 and 12.8 volts on a good battery. Now start the engine and watch the voltage. If the alternator is working properly, you should see a voltage increase to between 13.8 and 15 volts. You want it to be no higher than 15 and preferably not much past 14 if it's a warm day. If you see higher than that then you should take it to a shop and have them run a charging system test on the battery and charging system. This is the basic test, but it may not show you odd items like the charging testers they use would.
https://www.2carpros.com/articles/how-to-check-a-car-alternator
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Wednesday, May 17th, 2023 AT 6:34 PM