P0225 OBD-II Trouble Code: Throttle/Pedal Position Sensor/Switch C Circuit Malfunction

Check Engine Light

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?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

More related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Long Does a Fuel Filler Neck Last?
Getting gas from the pump to your gas tank is the only way to keep a car going. The fuel filler neck is a metal tube that is welded to the...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...

Related questions

Q: The Check Engine light is on. I know the vehicle needs a new catalytic converter.

If someone has already diagnosed that the catalytic converter is faulty on your vehicle and you know they are correct, that is the cause of your check engine light. Your oxygen sensors pick up more fuel in the exhaust when...

Q: Wont start

You should have the vehicle scanned for codes to see if you have codes to the camshaft or crankshaft sensors. Either of these may cause the no spark condition. If the fuel pump regulator is bad, then you would...

Q: What does it mean if the Malfunction Indicator lamp/Check Engine Light comes on?

If the Malfunction Indicator Lamp/Check Engine Light comes on, this could be an indication of several things. Many of which will differ depending on the make and model of the vehicle and the manufacturer’s specifications. The purpose of this warning...