P0228 OBD-II Trouble Code: Throttle/Pedal Position Sensor/Switch C Circuit High Input

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0228 code

P0228 is a diagnostic trouble code (DTC) for "Throttle/Pedal Position Sensor/Switch C Circuit High Input". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE P0228 DIAGNOSTIC Get a fair and transparent estimate upfront

P0228 code definition

Throttle/Pedal Position Sensor/Switch C Circuit High Input

What the P0228 code means

P0228 is a generic OBD-II code which indicates that the throttle/pedal position sensor/switch C circuit has a high input problem causing the sensor input to the engine control module (ECM) to be higher than the expected voltage input compared to the redundant throttle position sensor A, or above specified range.

What causes the P0228 code?

  • The ECM detects that the sensor circuit voltage is above the specified range for the sensor

  • Short 5 volt reference to the signal wire could cause low voltage to the ECM. This can be from external wiring problems, or from an internally shorted sensor

What are the symptoms of the P0228 code?

  • The Check Engine Light and Electronic Throttle Control (ETC) Light will be illuminated

  • The ECM goes into failure limp home mode; drive complaints may vary depending on manufacturer programming

  • The throttle is shut completely during stops to prevent excessive RPM’s

  • The throttle sets to a fixed position during acceleration to limit throttle opening

  • Uneven idle or jerking during braking, due to the closed throttle position

  • Limited acceleration due to very poor throttle response, or no response at all, during acceleration

  • Vehicle speed limited to 32 mph or less

  • Disabled cruise control

How does a mechanic diagnose the P0228 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 for shorting or burned wires, which could cause a short to power

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

  • Disconnects and checks the sensor resistance to see if sensor short is internal

Common mistakes when diagnosing the P0228 code

Follow these simple guidelines to prevent misdiagnosis:

  • Do a visual check of the wiring to the sensor to make sure they are not shorted in any way

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

How serious is the P0228 code?

  • Any problems with the throttle sensor cause the limp mode to be activated

  • The engine will go into limp home mode and systems will be limited, depending on the manufacturer

  • 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 P0228 code?

  • Repairing or replacing shorted wiring to the sensor
  • Replacing a defective throttle body control assembly if it is internally shorted
  • Replacing or reprogramming the ECM if so directed by the pinpoint tests

Additional comments for consideration regarding the P0228 code

The code P0228 is triggered when the signal getting to the ECM is higher than specified, and can be due to a short in the wire harness between the sensor and the ECM. This code is not used by most manufacturers and approved pinpoint tests should be followed.

Need help with a P0228 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.

Check Engine Light
P0228
trouble codes

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0228 code.

SCHEDULE P0228 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P0547 OBD-II Trouble Code: Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 1
P0547 means that the PCM is reading a malfunction in the exhaust gas temperature sensor circuit due to faulty wiring, sensor issues or exhaust leaks.
P2639 OBD-II Trouble Code: Torque Management Feedback Signal A Low
P2639 means a issue with one of the supporting control modules which may include transmission control module or fuel injection control module.
P0673 OBD-II Trouble Code: Cylinder 3 Glow Plug Circuit
P0673 means there are issues with a computer output circuit due to defective glow plug in cylinder 3, in a module or timer and in a relay.

Related questions

Reduced engine power error with check engine and stabil check error.
When the throttle body is replaced on these vehicles, an idle learn and throttle position learn must be performed to program in the new throttle plate angles because the values will be a little different on the new part. The...
service engine soon
There is a TECHNICAL SERVICE BULLETIN for the problem and need to reprogram the PCM to a new level. The code is for a cam sensor signal being misread by computer and this TSB needs to be done before replacing...
low gas mileage, bad exhaust smell
Dependin where the exhaust leak is can cause the O2 sensors to not get correct amount of gases in the exhaust and cause the rich running condition. I would suggest having the computer codes pinpoint tests be done to see...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com