P0225 code definition
Throttle/Pedal Position Sensor/Switch C Circuit Malfunction
What the P0225 code means
P0225 is a generic OBD-II code which indicates that the throttle/pedal position sensor/switch C circuit has an internal failure. The sensor went out of range, causing the throttle to become unresponsive and the engine to go into failure mode.
What causes the P0225 code?
The engine control module (ECM) detects sensor circuit voltage above or below the specified range designed for the sensor over a specified time.
What are the symptoms of the P0225 code?
- The sensor is ignored during braking
- The throttle may be set to a fixed position during failure on some vehicles
- Uneven idle or jerking during braking
- Very poor throttle response during acceleration
- The cruise control will be disabled
- The vehicle speed will be limited to approximately 32 mph
- The Check Engine Light and ETC light will be illuminated
How does a mechanic diagnose the P0225 code?
Scans codes and documents the freeze frame data
Clears the codes to verify whether the concern comes back
Does a visual check of the wiring and connections to the throttle body sensor
Disconnects connection to the sensor and checks for corrosion, or problems with pin engagement
Tests for proper battery voltage to the sensor
Checks the battery and charging system for proper operation
Tests the sensor resistance and compares it to specifications
Common mistakes when diagnosing the P0225 code
Follow these simple guidelines to prevent misdiagnosis:
Do a visual check of connections to the sensor to make sure they are making good contact to the throttle control assembly
Make sure that the battery and charging system is working properly
Check the throttle plates for blockage or contamination with oil, dirt or debris
How serious is the P0225 code?
- The vehicle speed will be limited to less than 35 mph
- The engine may hesitate or lack acceleration
- The engine idle will be erratic and be set higher than normal
What repairs can fix the P0225 code?
Repairing the battery and charging system for low voltage conditions
Repairing or replacing a defective connector or wiring to the sensor if it is corroded or has connector damage
Replacing a defective throttle body control assembly
Additional comments for consideration regarding the P0225 code
The code P0225 is for one of the multiple sensors for the throttle body control. Some vehicles use the sensor to compare voltage output with the redundant sensors to prevent throttle control issues. This code may have various drive symptoms, depending on the manufacturer's failure mode.
Need help with a P0225 code?
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