P Codes – OBD2 Powertrain Codes

Learn all about the P2421 code, what causes evaporative emission system vent valve stuck open, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P2423 code, what causes HC Adsorption Catalyst Efficiency Below Threshold, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P2422 code, what causes evaporative emission system vent valve stuck closed, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P242C code, what causes exhaust gas temperature sensor circuit low, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P2428 code, what causes exhaust gas temperature too high, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P2426 code, what causes exhaust gas recirculation cooling valve control circuit low, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P242B code, what causes Exhaust Gas Temperature Sensor Circuit Range/Performance issues, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P242A code, what causes exhaust gas temperature sensor circuit issues, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P2427 code, what causes exhaust gas recirculation cooling valve control circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P2429 code, what causes exhaust gas temperature too high, and how to diagnose and fix common issues to maintain optimal engine performance.