P CODES (POWERTRAIN) P0400 - P0499 P0430

I Have 2 Codes For My Truck. They Are: P0420 And P0430 Catalyst System Efficiency Below Threshold (bank 1) Catalyst System Efficiency...

Just Had All Four 02 Sensors Replaced. Now, Though The Car Isn't Stalling, It's Running A Little Rough At Idle And Has A Little...

I Scanned The Car For Codes Due To My Check Engine Light Coming On And It Gave Me These Codes P0430 Twice, P0171, P0174 And P0300. I...

In June My Car Developed A Leak At The Clamp Where The Y Pipe Meets The Engine. I Took It To A Mechanic Who Replaced The Whole Pipe. I...

Drivers Side, I Checked Out The Oxygen Sensor Just Before The Exhaust Exits The Converter It Reads.4-.5. And Bank 2. I Suspect It’s The...

Hi. My Cel Went On. Day After An Exhaust Leak Started. As I Cannot Do My Own Work Anymore. I Went To A Mechanic. But I Had Scanned And...

Got P0430 And P0420 Codes Show Up For Inefficient Cat. Replaced Post Cat O2 Sensors With No Luck; Check Engine Light Came Back. Took To A...