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

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE B2106 DIAGNOSTIC 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 for $79.99. 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$79.99$20.00
Toyota$79.99$20.00
BMW$79.99$20.00
SCHEDULE B2106 DIAGNOSTIC Get a fair and transparent estimate upfront

check engine light

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.

4WD
trouble codes
Check Engine Light
Throttles
B2106

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE B2106 DIAGNOSTIC
Get a fair and transparent estimate upfront

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

4,255

Rating Summary
3,898
174
45
26
112
3,898
174
45
26
112
Ben

Ben

39 years of experience
1020 reviews
Ben
39 years of experience
Lexus LS430 - Check Engine Light is on - Houston, Texas
I was very pleased with the courtesy and work of Mr. Smith. He was exceptional in explaining and correcting the problem and thereby gained my trustI . I request he be my mechanic in all future service requests. I had a great experience working with Mr. Ben Smith.
Richard

Richard

19 years of experience
203 reviews
Richard
19 years of experience
Ram ProMaster 1500 - Check Engine Light is on - Bonita Springs, Florida
Prompt, polite and personal. Took the time to explain the process and his recommendations. 2 thumbs up
Michael

Michael

23 years of experience
37 reviews
Michael
23 years of experience
Ford F-150 - Check Engine Light is on - Federal Way, Washington
Very helpful and explained everything and what needs to be addressed. I feel informed and confident in Mike’s assessment and look forward to him performing services on my vehicle.
Rigoberto

Rigoberto

9 years of experience
650 reviews
Rigoberto
9 years of experience
Honda Civic - Check Engine Light is on - Chicago, Illinois
Rigoberto came on time & quickly diagnosed the problem- rats chewed thru wiring near the battery. He wasn’t able to fix it himself bc of parts, but gave me recommendations on where to go & how to not have the dealership sell me services that are not needed.

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...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...
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...

Related questions

Q: ticking / clicking noise coming from the front end while driving a low speeds.

Hi there. The ticking noise could be the universal joints on the driveshafts or axle shafts on the front axle. The ticking noise could be the universal joints having the bearings burned up causing the caps to move around on...

Q: P2006 code - intake runner stuck closed

When you got a 1.6 volt reading from the test you did, this is not a normal test done for this code. Only a proper pinpoint done by a manufacturer approved test procedure would be able to diagnose the system...

Q: It will rev at high RPMs but in drive it won't move until 2k RPMs. It will only stay in that area of RPMs

Hi. The first task is to extract the problem codes which the Check Engine light indicates are present. These codes are most helpful in diagnosing problems with your vehicle. Two different transmissions were offered in the Civic - the...

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