P Codes – OBD2 Powertrain Codes

Learn all about the P2638 code, what causes torque management feedback signal issues, and how to diagnose and fix common problems to maintain optimal vehicle performance.

Learn all about the P2639 code, what causes torque management feedback signal "A" low, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P2640 code, what causes Torque Management Feedback Signal "A" High, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P2641 code, what causes Torque Management Feedback Signal "B", and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P2642 code, what causes torque management feedback signal issues, and how to diagnose and fix common problems to maintain optimal vehicle performance.

Learn all about the P2643 code, what causes Torque Management Feedback Signal "B" low, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P2644 code, what causes torque management feedback signal "B" high, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P2645 code, what causes "A" rocker arm actuator control circuit/open, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P2646 code, what causes "A" rocker arm actuator system performance issues, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P2647 code, what causes "A" rocker arm actuator system to be stuck on, and how to diagnose and fix common issues to maintain optimal engine performance.