P Codes – OBD2 Powertrain Codes

Learn all about the P20E7 code, what causes reductant injection air pressure to be too high, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P20E8 code, what causes reductant pressure too low, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P20E9 code, what causes reductant pressure too high, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P20EA code, what causes reductant control module power relay de-energized performance issues, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P20EB code, what causes issues with the reductant control module power relay, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P20EC code, what causes SCR NOx catalyst over temperature, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P20ED code, what causes SCR NOx pre-catalyst over temperature, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P20EE code, what causes SCR NOx catalyst efficiency below threshold, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P20EF code, what causes SCR NOx pre-catalyst efficiency below threshold, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P20F0 code, what causes SCR NOx catalyst over temperature, and how to diagnose and fix common issues to maintain optimal engine performance.