TPS Signal Not Consistent with MAF Signal
1993-1997 Mazda MX-6 2.0L I4
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 volume.
Symptoms
- Check Engine Light
- Poor acceleration
- Rough idle
- Hesitation
- Poor fuel economy
Common Causes
- Dirty or faulty MAF sensor
- Faulty TP sensor
- Vacuum leak allowing unmetered air
- Restricted air filter
- Intake air leak between MAF and throttle body
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 restricted
Repair Notes
Clean the MAF sensor; check for vacuum leaks and replace the 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 1993-1997 Mazda MX-6?
P1121 stands for "TPS Signal Not Consistent with MAF Signal". 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 volume.
What are the symptoms of P1121 on a Mazda MX-6?
Common symptoms of P1121 include: Check Engine Light, Poor acceleration, Rough idle, Hesitation, Poor fuel economy.
What causes P1121 on a 1993-1997 Mazda MX-6?
Common causes of P1121 include: Dirty or faulty MAF sensor, Faulty TP sensor, Vacuum leak allowing unmetered air, Restricted air filter, Intake air leak between MAF and throttle body.