Kazalo kodova grešaka · high
P1121
Throttle position (TP) sensor / mass air flow (MAF) sensor - implausible signal
Throttle position (TP) sensor / mass air flow (MAF) sensor - implausible signal
Applies to: All X-TYPE variants, 2001-2009 (saloon & estate) · Confidence: Manufacturer code list + field-verified causes
Common causes
- TP sensor drift (water ingress at throttle body connector)
- MAF contamination or intake leak
- Mismatch between commanded and actual airflow
Quick checks
- Scan access: Jaguar-specific: WDS/IDS or a Jaguar-capable scan tool
- Prefer official/field-verified path before guessing sensors
Typical fixes
- Check the throttle body connector for water/corrosion - the X-TYPE scuttle drain wets this connector
- Clean MAF
- Run throttle adaption
- Replace throttle body