Independent Jaguar & Land Rover resource
Diagnostics
Specialist Jaguar and Land Rover diagnostics using full DTC suffixes, all-module scans, live data and evidence-led testing.
A diagnostic trouble code is the beginning of a test plan, not proof that the component named in its description has failed. Jaguar and Land Rover vehicles use interconnected engine, transmission, chassis, body, security and telematics modules. One low-voltage event can produce faults across several systems.
Our diagnostic method
- Confirm the customer complaint and exact dashboard wording.
- Test battery condition, charging performance and main supplies.
- Run a complete all-module scan using JLR-capable equipment.
- Save full codes, suffixes, status, freeze-frame and module identity.
- Check technical information for the exact model, year and powertrain.
- Compare commanded and actual live data.
- Test wiring, connectors and components before replacement.
- Verify the repair and confirm codes do not return.
Why the suffix matters
C1A20-64 contains more diagnostic information than C1A20. Failure-type suffixes can identify plausibility, missing messages, circuit problems or internal module failures. Never discard them when requesting help.
Showing a small preview. Use search to access the complete 9,603-code database.
BodyBB0002Driver Frontal Stage 2 Deployment Control
BodyBB0003Driver Frontal Stage 3 Deployment Control
BodyBB0004Driver Knee Bolster Deployment Control
BodyBB0005Collapsible Steering Column Deployment Control
BodyBB0010Passenger Frontal Stage 1 Deployment Control
BodyBB0011Passenger Frontal Stage 2 Deployment Control
BodyBB0012Passenger Frontal Stage 3 Deployment Control
BodyBB0013Passenger Knee Bolster Deployment Control
BodyBB0018Center Frontal Stage 1 Deployment Control
BodyBB0019Center Frontal Stage 2 Deployment Control
BodyBB001ACenter Frontal Stage 3 Deployment Control
BodyB
Send the exact warning or full fault code.
Include the model, year, symptoms and complete suffix so your enquiry can be routed correctly.
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Search JLR diagnostics & fault codes
Search the complete code, including its suffix where available. Exact JLR module-specific matches are prioritised above generic base-code records.