Check engine code p0342

[avguy]

In order to do the load test, you'll need to have a helper, unless you have extra long leads for the multi meter, so that you can read it while inside the vehicle.

Start by checking the voltage of the battery with the engine off. You should see somewhere around 12.6 volts.

Then start the engine, turn everything electrical off, and check the voltage again. You should see a value somewhere between 13.5 and 14.5 volts, and we'll call that the baseline voltage.

Next have a helper switch each electrical item in the vehicle on, one-at-a-time. You need to watch the meter carefully when an item is switched on, looking for the baseline voltage to drop down for just a moment, and then bounce right back up to the baseline voltage. (some things might not cause a noticeable drop). Have the helper leave each item on, as they proceed to the next one. If the charging system is working properly, the battery voltage will still be at the original baseline, even with everything electrical running concurrently.

If the results of the testing do not follow the above description, then post back with exactly what is happening.