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Our technical bulletins (TBs) are created when we encounter three or more related issues whilst providing diagnostic support. Making our technical bulletins the first point of call for Diesel Help members.

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TB1317 – Land Rover Discovery fault codes p045b and p045c

Clinton Brett | August 25, 2026
Land Rover Discovery EGR fault, Mazda BT50 turbo faults, BT50 feedback values, P1455 Isuzu, Ford Transit P0409

✓ Land Rover Discovery III & IV diesel models
✓ EGR-related fault codes P045B, P045C and P0490
✓ Acceleration and limp mode concerns

The full member bulletin includes the known cause of this fault, diagnostic information and Diesel Help's recommended repair guidance.

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