How can Prius owners test an ignition coil to confirm failure

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How can Prius owners test an ignition coil to confirm failure

Testing methods include:

OBD-II scanning for misfire codes
Swap test switching coils between cylinders to see if the misfire follows
Using a multimeter to check coil resistance
Discussing these diagnostic steps can help Prius owners troubleshoot at home.

Zarnish asked on 13 Feb 2025 16:10:27 pm

1 Answer

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Car Mechanic Expert - on 13 Feb 2025 16:27:32 pm

There are several ways Prius owners can test an ignition coil:

OBD-II Scanning: Use an OBD-II scanner to check for misfire-related codes P0300, P0351–P0354. This is one of the most reliable ways to confirm ignition coil problems.
Swap Test: If the misfire is specific to a particular cylinder, swap the ignition coils between cylinders. If the misfire moves to the new cylinder, the coil is likely faulty.
Multimeter Test: Use a multimeter to check the coil’s resistance. If the resistance is outside the recommended range, the ignition coil is likely defective.

These tests can help Prius owners confirm whether the ignition coil needs to be replaced.