P Codes – OBD2 Powertrain Codes

Learn all about the P041F code, what causes secondary air injection system issues, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P0424 code, what causes heated catalyst temperature below threshold, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P0425 code, what causes catalyst temperature sensor circuit issues, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P0426 code, what causes catalyst temperature sensor circuit range/performance issues, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P0427 code, what causes catalyst temperature sensor circuit low, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P0428 code, what causes catalyst temperature sensor circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P0429 code, what causes catalyst heater control circuit issues, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P042A code, what causes catalyst temperature sensor circuit issues, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P042B code, what causes issues with the catalyst temperature sensor circuit, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P042C code, what causes catalyst temperature sensor circuit low, and how to diagnose and fix common issues to maintain optimal engine performance.