P Codes – OBD2 Powertrain Codes

Learn all about the P0409 code, what causes issues with the Exhaust Gas Recirculation Sensor circuit, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P040A code, what causes issues with the Exhaust Gas Recirculation Temperature Sensor "A" Circuit, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P040B code, what causes issues with the Exhaust Gas Recirculation Temperature Sensor, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P040C code, what causes Exhaust Gas Recirculation Temperature Sensor "A" Circuit Low, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P040D code, what causes exhaust gas recirculation temperature sensor "A" circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P040E code, what causes exhaust gas recirculation temperature sensor issues, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P040F code, what causes exhaust gas recirculation temperature sensor "A"/"B" correlation issues, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P0412 code, what causes issues with the Secondary Air Injection System, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P0413 code, what causes issues in the secondary air injection system, and how to diagnose and fix common problems to maintain optimal engine performance.

Learn all about the P0414 code, what causes the secondary air injection system switching valve "A" circuit shorted, and how to diagnose and fix common issues to maintain optimal engine performance.