AutoCodes – Generic – B1990

B1990 Code - Pedal Forward / Rearward Potentiometer Feedback Circuit Failure

Quick Answer

The Body Control Module (BCM) monitors the Pedal Forward / Rearward Potentiometer. Common causes include Faulty Pedal Forward / Rearward Potentiometer, Pedal Forward / Rearward Potentiometer harness is open or shorted, Pedal Forward / Rearward Potentiometer circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1990 indicates Pedal Forward / Rearward Potentiometer Feedback Circuit Failure.
Common causes: Common causes include Faulty Pedal Forward / Rearward Potentiometer, Pedal Forward / Rearward Potentiometer harness is open or shorted, Pedal Forward / Rearward Potentiometer circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 10,878

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 03, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1990 Description

The Body Control Module (BCM) monitors the Pedal Forward / Rearward Potentiometer. The BCM sets the OBDII code when the Pedal Forward / Rearward Potentiometer is not to factory specifications.

OBDII Code B1990 - Pedal Forward / Rearward Potentiometer Feedback Circuit Failure - AutoCodes.com — B1990 Code - Pedal Forward / Rearward Potentiometer Feedback Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B1990?

Faulty Pedal Forward / Rearward Potentiometer
Pedal Forward / Rearward Potentiometer harness is open or shorted
Pedal Forward / Rearward Potentiometer circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1990?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1990 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1990 code?

Need more information on how to fix the B1990 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1990 code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1990 Code

1. What are the common symptoms of OBDII code B1990 (Pedal Forward / Rearward Potentiometer Feedback Circuit Failure)?

- Common symptoms include the vehicle's accelerator pedal feeling unresponsive, the vehicle going into limp mode, and the malfunction indicator light (MIL) illuminating on the dashboard.

2. What are the possible causes of OBDII code B1990?

- The code B1990 can be triggered by issues such as a faulty pedal position sensor, damaged wiring or connectors in the pedal assembly, or a malfunction in the electronic control module.

3. How is OBDII code B1990 diagnosed?

- Diagnosis of code B1990 involves using a scan tool to retrieve the code, checking the wiring and connectors related to the pedal position sensor, and performing a thorough inspection of the pedal assembly components.

4. What are the repair options for OBDII code B1990?

- Repair options may include replacing the faulty pedal position sensor, repairing or replacing damaged wiring or connectors, or reprogramming the electronic control module if necessary.

5. Can OBDII code B1990 be fixed at home, or is professional help required?

- Depending on the underlying cause, some DIY enthusiasts may be able to address OBDII code B1990 at home by following repair guides or using specialized tools. However, professional help may be required for complex issues.

6. How urgent is it to address OBDII code B1990?

- It is important to address OBDII code B1990 promptly to avoid potential safety hazards, performance issues, and further damage to the vehicle's components. Ignoring the code could lead to more severe problems.

7. Are there any preventative measures to avoid OBDII code B1990 in the future?

- Regular maintenance, such as checking and cleaning the accelerator pedal assembly, inspecting wiring harnesses for wear and tear, and using high-quality components, can help prevent issues that may trigger code B1990.

8. Can OBDII code B1990 cause permanent damage to the vehicle if left unfixed?

- If left unfixed for an extended period, OBDII code B1990 can potentially cause permanent damage to the vehicle's electronic control systems and affect its overall performance and drivability.

9. How long does it typically take to repair OBDII code B1990?

- The repair time for OBDII code B1990 can vary depending on the specific cause of the issue, the availability of replacement parts, and the expertise of the person performing the repair. It may range from a few hours to a day or more.

10. Is it safe to drive with OBDII code B1990 present in the vehicle?

- It is not recommended to drive the vehicle with OBDII code B1990 present, as it can lead to unpredictable acceleration or braking behavior, potentially compromising safety on the road. It is advisable to address the issue before driving the vehicle again.