What does code P1121 mean on Ford vehicles?
The TPS signal does not correlate with the MAF sensor reading.
OBD-II Code Ford
P1121 — Ford — TPS Inconsistent with MAF
The TPS signal does not correlate with the MAF sensor reading.
Common symptoms
- Irregular acceleration
- loss of power
Possible causes
- TPS or MAF fault
- intake system issues
Initial recommendation
Perform comparative TPS–MAF diagnostics and inspect intake system.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine Ford code P1121 with your vehicle's actual symptoms for more complete diagnostic guidance.
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