TP Sensor Inconsistent with MAF Sensor
2000-2003 Ford Excursion 7.3L V8 Power Stroke Diesel
Description
The Throttle Position sensor and Mass Air Flow sensor readings do not agree with each other. When the throttle shows a certain opening, the MAF does not confirm the expected airflow, indicating one sensor may be faulty.
Symptoms
- Check Engine Light
- Poor acceleration
- Rough idle
- Hesitation
- Poor fuel economy
Common Causes
- Dirty or faulty MAF sensor
- Faulty TP sensor
- Vacuum leak
- Restricted air filter
- Intake air leak
Diagnostic Steps
- Compare TP and MAF readings simultaneously on scan tool
- Clean MAF sensor
- Check for vacuum leaks
- Test TP sensor through full range
- Replace air filter if dirty
Repair Notes
Clean MAF sensor. Check for vacuum leaks. Replace faulty sensor.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1121 on Other Vehicles
Common Questions
What does code P1121 mean on a 2000-2003 Ford Excursion?
P1121 stands for "TP Sensor Inconsistent with MAF Sensor". The Throttle Position sensor and Mass Air Flow sensor readings do not agree with each other. When the throttle shows a certain opening, the MAF does not confirm the expected airflow, indicating one sensor may be faulty.
What are the symptoms of P1121 on a Ford Excursion?
Common symptoms of P1121 include: Check Engine Light, Poor acceleration, Rough idle, Hesitation, Poor fuel economy.
What causes P1121 on a 2000-2003 Ford Excursion?
Common causes of P1121 include: Dirty or faulty MAF sensor, Faulty TP sensor, Vacuum leak, Restricted air filter, Intake air leak.