Index storingcodes · medium
P1129
Heated oxygen sensors (HO2S) 2 (downstream), bank 1/2 - swapped
Heated oxygen sensors (HO2S) 2 (downstream), bank 1/2 - swapped
Applies to: All X-TYPE variants, 2001-2009 (saloon & estate) · Confidence: Manufacturer code list + field-verified causes
Common causes
- Downstream sensor connectors fitted to the wrong banks
Quick checks
- Scan access: Jaguar-specific: WDS/IDS or a Jaguar-capable scan tool
- Prefer official/field-verified path before guessing sensors
Typical fixes
- Swap the downstream sensor connectors back to their correct banks