Skip the auto shop - Our mechanics make house calls

P0227 OBD-II Trouble Code: Throttle/Pedal Position Sensor/Switch C Circuit Low Input

Check Engine Light

P0227 code definition

Throttle/Pedal Position Sensor/Switch C Circuit Low Input

What the P0227 code means

P0227 is a generic OBD-II code indicating that the throttle/pedal position sensor/switch C circuit has a low input problem causing the sensor input to the engine control module (ECM) to be lower than the expected voltage input compared to the redundant throttle position sensor A .

What causes the P0227 code?

  • The ECM detects the sensor circuit voltage below the specified range for the sensor
  • Short to ground in the signal cable causing low voltage to the ECM
  • Open circuit in the signal cable from a break in the wire, or corrosion in connections

What are the symptoms of the P0227 code?

  • Check Engine Light and Electronic Throttle Control (ETC) Light will be illuminated
  • The throttle shuts completely during stops
  • The throttle sets to a fixed position during acceleration failure
  • Uneven idle or jerking during braking due to the closed throttle position
  • Acceleration is limited by very poor throttle response, or no response at all, during acceleration
  • Vehicle speed limited to 32 mph or less

How does a mechanic diagnose the P0227 code?

  • Scans codes and documents the freeze frame data in order to verify the problem

  • Clears the engine and ETC codes to verify whether the concern comes back

  • Does a visual check of the wiring and connections to the throttle body sensors to see if they are broken or cut in any way

  • Disconnects connection to the sensors and checks for corrosion or problems with pin engagement

  • Checks scan data to see if sensor signal voltage is open, and follows pinpoint testing steps to find the open circuit

  • Checks and verifies the sensor resistance, and compares it to vehicle specifications

Common mistakes when diagnosing the P0227 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

  • Look for any problems with burnt or cut wiring to the sensor, or corrosion in the connections.

How serious is the P0227 code?

  • Any problems with the throttle sensor can cause the limp mode to be activated
  • The engine will go into limp home mode and systems will be limited
  • The vehicle speed will be limited to less than 35 mph
  • The engine will lack acceleration or have limited acceleration
  • The engine idle will be low and erratic when coming to a stop

What repairs can fix the P0227 code?

  • Repairing or replacing a defective connector or wiring to the sensor if it is corroded or has connector damage

  • Repairing cuts or shorts in the wiring to the sensor

  • Replacing the throttle body control assembly if defective

  • Replacing or reprogramming the ECM if directed by the pinpoint tests

Additional comments for consideration regarding the P0227 code

The code P0227 is triggered when the signal getting to the ECM is lower than specified. This can be due to corrosion or loose connections at the sensor. Cleaning the connector and using a dielectric compound to help stop any corrosion from returning is recommended.

Need help with a P0227 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
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance Related Trouble Codes: P2158: Vehicle Speed Sensor B P2160: Vehicle Speed Sensor B Circuit Low P2161:...


Related questions

Q: Check Engine Light is on - codes P0313, P0299, P0304

Hi there. Based on what you've described, this could be a combination of faults between 2 or more things; however, I don't believe the coils and spark plugs are at fault. One of the codes is set during a low...

Q: I installed a new crankshaft positioning sensor, now I'm getting misfires and code P0300. Is this supposed to happen?

Assuming you replaced your vehicle's crankshaft position sensor for a P0335 trouble code and that code has not returned, this leads me to believe that the new sensor is either faulty or misadjusted. The sensor replacement should not have caused...

Q: Check Engine Light appears and disappears, engine misfires occasionally

Many common faults will cause misfires on your 2006 Honda Pilot. Without knowing what check engine light your vehicle has I can only offer general advice on the issue. The most common causes are spark plugs, plug wires, MAF sensor,...