Looking for a little help...could this be bad spark plugs? Initially my truck was showing these codes:

P2032 Ignition Coil 1 Secondary Circuit Insufficient Ionization

P2314 Ignition Coil 5 Secondary Circuit Insufficient Ionization

P0551 Power Steering Pressue Switch

P0420 Catalyst Efficiency Bank 1

P0430 Catalyst Efficiency Bank 2

I replaced coils on 1 & 5 and replaced power steering pressure switch (wow it was leaking bad!) After driving the truck a few times check engine light came on again and now I am showing: Ignition Coil 1 Secondary Circuit...... Ignition Coil 3 Secondary Circuit.... Ignition Coil 5 Secondary Circuit....

I have been told it maybe a pcm issue? The truck is running good except poor gas mileage...

Any tips/advice would be greatly appreciated.

 

What year truck? If yours is old enough to still have plug wires that could be your whole problem. Wires should be changed at 60k max.

ALSO, if you're running an aftermarket tuner that advances timing, you need thicker wires. I still get an occasional Ignition Coil CEL every once in a while with 7mm wires. Going to 8mm at next plug change and that should fix it for me...

 

Truck is an '04 hemi; i have aftermarket plug wires on it 9mm and factory coils.

Not sure how I forgot to mention year/engine ....sorry!