Throttle Position Sensor Out of Range Low
2016-2021 Mazda CX-3 2.0L I4 🇨🇦
Description
The Throttle Position sensor signal is below the minimum expected voltage. The PCM sees a voltage lower than the normal idle-position threshold, which can trigger limp mode on electronic throttle systems.
Symptoms
- Check Engine Light
- Poor acceleration
- Idle surge
- Engine stalling
- Limp mode
Common Causes
- Faulty TP sensor
- Wiring short to ground
- Loose TP sensor connector
- TP sensor misadjusted on cable-actuated throttle
- Corroded connector pins
Diagnostic Steps
- Check TP sensor voltage at idle (should be approximately 0.5-1.0V)
- Inspect wiring for shorts to ground
- Check connector for corrosion or looseness
- Test TP sensor through full range with multimeter
- Verify 5V reference voltage
Repair Notes
Replace the TP sensor if faulty; repair wiring if shorted to ground.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
P1120 on Other Vehicles
Common Questions
What does code P1120 mean on a 2016-2021 Mazda CX-3?
P1120 stands for "Throttle Position Sensor Out of Range Low". The Throttle Position sensor signal is below the minimum expected voltage. The PCM sees a voltage lower than the normal idle-position threshold, which can trigger limp mode on electronic throttle systems.
What are the symptoms of P1120 on a Mazda CX-3?
Common symptoms of P1120 include: Check Engine Light, Poor acceleration, Idle surge, Engine stalling, Limp mode.
What causes P1120 on a 2016-2021 Mazda CX-3?
Common causes of P1120 include: Faulty TP sensor, Wiring short to ground, Loose TP sensor connector, TP sensor misadjusted on cable-actuated throttle, Corroded connector pins.