B2106 OBD-II Trouble Code: Throttle Position Input Out of Range High

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the B2106 code

B2106 is a diagnostic trouble code (DTC) for "Throttle Position Input Out of Range High". 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. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 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$20.00
Toyota$20.00
BMW$20.00
SCHEDULE B2106 DIAGNOSTIC Get a fair and transparent estimate upfront

B2106 code definition

The B2106 trouble code notes an error with the throttle position input range.

What the B2106 code means

The B2106 code is a standard OBD-II trouble code for the four-wheel drive (4WD) system, that detects a range issue with the throttle position input. Vehicles utilize throttle pedal position sensors, which relay the pedal position information to the powertrain control module (PCM), which calculates the proper fuel strategy based on this info. For cars that have a 4WD system, the PCM sends this information to the 4WD control module, which relies on this data to control the use of the 4WD clutch. Any time that the 4WD control module is not receiving this information from the PCM, then it is likely that the P2106 trouble code will be detected.

What causes the B2106 code?

The B2106 trouble code is usually caused by a damaged circuit in the 4WD system, which can be the result of a shorted wires, loose harnesses, disconnected grounds, or blown fuses. The code is also commonly caused by loose connectors in the 4WD control module. While very rare, it is possible for the code to be triggered due to a 4WD control module or PCM failure.

While those are the causes commonly associated with this code, the B2106 code may also be stored due to a throttle pedal position sensor failure. Throttle position sensor failure is usually caused by a damaged sensor, a misadjusted sensor, a malfunctioning throttle body, or damaged electrical components in the throttle position sensor system. However, if any of these issues are the cause of the B2106 trouble code, then there will also be a throttle position sensor powertrain trouble code, which should be diagnosed before the B2106 code.

What are the symptoms of the B2106 code?

If the B2106 trouble code is present, then it is likely that the 4WD system will have some issues, because the 4WD clutch will not have the throttle position input data that it requires to function properly. As a result, the vehicle will likely experience more slippage than it normally would, and it is possible that the car will be incapable of shifting into or out of 4WD. It is also likely that the 4WD Warning Light and check engine soon Warning Lights will illuminate on the instrument panel.

In addition to these symptoms, if the vehicle has throttle pedal position powertrain trouble codes that have been detected, then there will probably be drivability symptoms such as poor acceleration, frequent stalling, black smoke upon startup, or an inability to turn on.

How does a mechanic diagnose the B2106 code?

The B2106 code will be diagnosed with the help of a basic OBD-II trouble code scanner. A trained technician will view the freeze frame data on the scanner to gather information about the B2106 code. Additional trouble codes will also be checked for, and, if present, will need to be diagnosed in the order that they appear in. The trouble codes will then be reset, the vehicle restarted, and the B2106 code searched for again. If the code is no longer present, then an intermittent error or an inaccurate detection are likely to blame.

If the B2106 code is still present after the reset, and throttle pedal position sensor powertrain trouble codes are listed above it, then it is probable that the B2106 code will be resolved when the powertrain codes are diagnosed. If there are no powertrain codes present, then the technician will begin by inspecting and testing the circuits in the 4WD system, and replacing any parts that are damaged or otherwise compromised. Next, the 4WD control module will need to be disconnected, and the mechanic will check the controller connectors.

When any parts are repaired or replaced, the diagnosis should be paused while the codes are reset, the vehicle restarted, and the B2106 code searched for again. This will alert the mechanic as soon as the problem is solved.

Common mistakes when diagnosing the B2106 code

The most frequently made mistake when diagnosing the B2106 code comes from not following the OBD-II trouble code diagnosis protocol. The diagnosis protocol should be observed at all times, because it increases the chances of a thorough diagnosis, and an efficient and accurate repair.

It’s fairly common for fully functional 4WD control modules to be inaccurately condemned because the circuits and electrical components were overlooked.

How serious is the B2106 code?

If the B2106 trouble code is detected, then the vehicle will likely struggle with the 4WD system. The vehicle may not be able to access 4WD, or shift out of 4WD, and more importantly, there will likely be excess slippage because of the inoperable 4WD clutch. If any throttle position sensor powertrain trouble codes are also present, the vehicle may have severe drivability concerns, and may not even be able to start. As soon as the B2106 code is detected, an inspection should be scheduled.

What repairs can fix the B2106 code?

Some repairs for the B2106 trouble code are:

  • Replacement of 4WD system circuits
  • Repair of the 4WD control module connectors
  • Replacement of wires, fuses, and connectors in the throttle position sensor
  • Replacement of the throttle position sensor
  • Replacement of the throttle body
  • In very rare cases, replacement of the PCM or 4WD control module

Additional comments for consideration regarding the B2106 code?

The B2106 code is a manufacturer specific trouble code. Manufacturer specific codes have varying definitions from manufacturer to manufacturer. While this code detects a throttle position input range problem in some cars, it can suggest an entirely different problem with other automakers. As is always the case, the mechanic should be aware of what vehicle is being worked on when diagnosing this code.

The B2106 code only applies to vehicles that have 4WD or all-wheel drive systems.

Need help with a B2106 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.

trouble codes
Throttles
Check Engine Light
B2106
4WD

No more waiting rooms! Our mechanics will come to you to diagnose and fix the B2106 code.

SCHEDULE B2106 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,064

Rating Summary
4,665
194
48
27
130
4,665
194
48
27
130

Mario

8 years of experience
22 reviews
Mario
8 years of experience
Chrysler PT Cruiser - Check Engine Light is on - Los Angeles, California
He was very courteous and knowledgeable. You can tell he knows his trade. Satisfied with his service.

Yoel

8 years of experience
91 reviews
Yoel
8 years of experience
Nissan Versa Note - Check Engine Light is on - Upper Darby, Pennsylvania
Yoel is very competent and provides great customer service. He took the time to explain and show me exactly what was going with my car. I will definitely use him again and recommend him to others.

Jason

31 years of experience
148 reviews
Jason
31 years of experience
Ford Explorer - Check Engine Light is on - Phoenix, Arizona
Jason was on time, friendly, explained everything he was doing and let me know the other services available, so when Jason comes back to install the new part I am having the oil changed too.

DeVaughn

25 years of experience
1 reviews
DeVaughn
25 years of experience
BMW X3 - Check Engine Light is on - Moreno Valley, California
The mechanic arrived on time, completed the work, which was replacement of an oxygen sensor, in a timely and professional manner.


More related articles

P0721 OBD-II Trouble Code: Output Speed Sensor Range/Performance
P0721 code means the transmission control module (TCM) isn't properly converting incoming pulse signals often due too poor, wiring or sensor.
P0231 OBD-II Trouble Code: Fuel Pump Secondary Circuit Low
P0230 P0230 code definition Fuel Pump Primary Circuit Malfunction What the P0230 code means P0230 is a generic OBD-II code which indicates that the fuel pump primary circuit has a malfunction of the vehicle power to the fuel pump when...
C1101 OBD-II Trouble Code: ABS Hydraulic Valve Circuit Failure
Trouble code C1101 means the engine control unit (ECU) has detected an unspecified failure in the ABS hydraulic valve circuit.

Related questions

My brother-in-law is fixing the car. First time yes it's been going on about two weeks finally the check engine light came on yesterday.

If the spark plugs are becoming coated with engine oil and there is excessive oil in the exhaust system, then there could be three symptoms to check. Symptoms PCV Valve could be plugged making the engine over pressurize and...

Why would my car instantly Redline when I turn the key to start it

Many cars do an instrument check when you turn on the key that involves the dials moving to maximum for a brief moment. But if the engine is actually redlining, you will know it because of the sound. If the...

Check Engine light coming on.

I would have the check engine light inspected by a YourMechanic Technician, They can pull codes off the computer and determine what is malfunctioning.

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.

1-800-701-6230 · hi@yourmechanic.com