Welcome to the Diesel Technical Bulletin Library

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.

Make the best use of the library by using the below search, or make and model drop down.

Heavy & light vehicle makes

TB1317 – Land Rover Discovery fault codes p045b and p045c

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.

🔒 Full Technical Bulletin – Member Access

Get access to this bulletin, plus Diesel Help's growing library of member-only technical bulletins, with a Diesel Help Membership.

Get Access to This Technical Bulletin →

TB1316 – PEUGEOT 407 EGR fault codes P045B and P045C

Peugeot 407 EGR fault, Toyota VDJ79 P1229, CANTER 4P10T intermittently stalls, p2453 isuzu, Jeep P201D-00, Toyota P2006, Toyota P2BAB, P0638 Isuzu, 27f000 bmw fault code, BMW Fault Codes, Fuel rail sensor codes

🔒 Member Access Required
This technical bulletin is part of Diesel Help’s member-only diagnostic library.

When diesel fault codes stop making sense, the issue is often understanding how the system you’re working on is designed to operate.

Start here: Know the diesel fuel system you are diagnosing

Need help on a current job?
Access Diesel Help Technical Support

Access over 300 technical bulletins, online training, and expert diagnostic support through Diesel Help membership — from $375 per year.

TB1315 – FORD Everest P5AT Nox and AdBlue fault codes P220E13 P20BA

Ford Everest AdBlue fault

🔒 Member Access Required
This technical bulletin is part of Diesel Help’s member-only diagnostic library.

When diesel fault codes stop making sense, the issue is often understanding how the system you’re working on is designed to operate.

Start here: Know the diesel fuel system you are diagnosing

Need help on a current job?
Access Diesel Help Technical Support

Access over 300 technical bulletins, online training, and expert diagnostic support through Diesel Help membership — from $375 per year.

TB1314 – Toyota Hilux Prado Fortuner 1GDFTV cooling system test can lead to engine hydraulic lock

Toyota Landcruiser 200 P2458, Toyota Hilux coolant loss, P1229 Fuel Pump System, Landcruiser Injector driver performance

🔒 Member Access Required
This technical bulletin is part of Diesel Help’s member-only diagnostic library.

When diesel fault codes stop making sense, the issue is often understanding how the system you’re working on is designed to operate.

Start here: Know the diesel fuel system you are diagnosing

Need help on a current job?
Access Diesel Help Technical Support

Access over 300 technical bulletins, online training, and expert diagnostic support through Diesel Help membership — from $375 per year.