Q: My car had code 420 pop up and cylinder 1,2,3 misfire , my car was jerking when I drove and had loss of power
My engine light came on an I drove it it stayed solid and had no problem driving then out of nowhere I had a almost kisses of power and my light started flashing and then would go solid also would jerk ,when I explained it to my mechanic he said mist likely the coils sence I already did my spark plugs when the codes were read it said cylinder 1,2,3 misfire and code 420 came up but then he cleared it An drove it An the only read cylinder 1 and its stayed like that an no other codes popped up in a few days also i been driving it slow an careful, I'm going to get it checked tomorrow do you think i need a new coil pack ?
My car has 173000 miles.
My car has an automatic transmission.
Recommended Services
| Engine is misfiring Inspection | $94.99 - $114.99 | Get a Quote |
| Catalytic Converter Replacement | $288.41 - $1959.69 | Get a Quote |
Misfires are frequently caused by ignition coil failures, but there are other possibilities as well. Sometimes I might diagnose a misfire by swapping components between cylinders to see if the misfire moves. Anyway, you are probably on the right track with the coil packs. The P0420 is a catalyst efficiency code. It will probably be back. The Honda catalysts are usually good for about 150 thousand miles, then you start getting that warning. It may stay out for a while then come back, you will reset it, and it will stay out but not as long. Eventually you will have to replace the catalyst. In either case, you can have these things checked out at your convenience by contacting YourMechnaic. They can send a technician to your home or office to check out your Misfire and your Catalyst right there on the spot
Get an instant quote for your car
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing