Feilkodeindeks · medium
P1131
Heated oxygen sensor (HO2S) 1 (upstream), bank 1 - slow response
Heated oxygen sensor (HO2S) 1 (upstream), bank 1 - slow response
Applies to: All X-TYPE variants, 2001-2009 (saloon & estate) · Confidence: Manufacturer code list + field-verified causes
Common causes
- Aged/contaminated sensor
- Exhaust leak
- Silicone or coolant poisoning
Quick checks
- Scan access: Jaguar-specific: WDS/IDS or a Jaguar-capable scan tool
- Prefer official/field-verified path before guessing sensors
Typical fixes
- Replace the bank 1 upstream wideband sensor
- Repair exhaust leaks