Fault code index · medium
P0040
Upstream oxygen sensors swapped bank to bank
Upstream oxygen sensors swapped bank to bank
Applies to: Generic SAE definition - verify applicability to the specific X-TYPE variant · Confidence: Generic SAE definition (not Jaguar-specific)
Common causes
- Sensor connectors fitted to the wrong banks
Quick checks
- Scan access: Generic OBD-II scan tool
Typical fixes
- Swap the upstream sensor connectors to their correct banks