Feilkodeindeks · medium
C1729
Rear axle / transfer case speed mismatch (AWD)
Rear axle / transfer case speed mismatch (AWD)
Applies to: All X-TYPE variants, 2001-2009 (saloon & estate) · Warning: ABS and/or DSC warning lamp · Default action: DSC/traction control disabled; ABS may be disabled (base brakes retained) · Confidence: Platform code set + documented X-TYPE failures
Common causes
- Mismatched tyre sizes or pressures across axles
- Viscous coupling or transfer case fault
- Wheel speed sensor fault
Quick checks
- Scan access: Jaguar-specific: WDS/IDS or an ABS-capable scan tool
Typical fixes
- Check that all four tyres are the same size, make and wear state - mismatched tyres are the classic AWD X-TYPE cause
- Check tyre pressures
- Inspect the transfer case and propshaft