5.7 hemi, 2012 ram 2500. When towing or kick into passing gear, 3000 rpm, check engine light starts blinking, code p0301, I changed spark plugs, coil pack, still happens at 3000 rpm. What does anyone think?
A blinking Check Engine light means a major misfire is occurring.
If the vehicle is driven with a blinking Check Engine light, damage to the engine/catalytic converters can occur.
Stop driving the vehicle until it’s determined what’s causing the Check Engine light to blink.
I would suspect a weak or restricted injector on cylinder #1.