B1991 Lincoln Code - Pedal Forward / Rearward Potentiometer Feedback Circuit Short to Battery
Quick Answer
he Driver Seat Module (DSM) uses a Hall-effect switch attached to the pedal motor to identify the current pedal position. Common causes include Faulty Adjustable Pedal Motor, Adjustable Pedal Motor harness is open or shorted, Adjustable Pedal Motor 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
- B1991 Lincoln indicates Pedal Forward / Rearward Potentiometer Feedback Circuit Short to Battery.
- Common causes
- Common causes include Faulty Adjustable Pedal Motor, Adjustable Pedal Motor harness is open or shorted, Adjustable Pedal Motor 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.
Code B1991 Lincoln Description
When 1 or more of the following Diagnostic Trouble Code (DTC) is set, the adjustable pedals will enter a jog mode. When the pedals are in jog mode, the memory system recall will not function from either the Remote Keyless Entry (RKE) transmitter or the memory SET switch buttons. When the pedals are actuated using the adjustable pedal switch, the motor will move the pedals for one second in the direction selected regardless of the length of time the button is actually pressed.
If the DSM detects a short to voltage on the circuit during normal operation or an on-demand self test and without any pedal switch input, DTC B1991 will be set.
What are the Possible Causes of the DTC B1991 Lincoln?
- Faulty Adjustable Pedal Motor
- Adjustable Pedal Motor harness is open or shorted
- Adjustable Pedal Motor circuit poor electrical connection
How to Fix the DTC B1991 Lincoln?
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 B1991 Lincoln 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 B1991 Lincoln code?
Need more information on how to fix the B1991 Lincoln code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1991 Lincoln code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B1991 Lincoln Code
1. What are the common symptoms of OBDII code B1991 in a Lincoln related to the Pedal Forward/Rearward Potentiometer Feedback Circuit Short to Battery?
- Common symptoms include erratic acceleration, unresponsive throttle pedal, and potential stalling of the vehicle.
2. What are the possible causes of the Pedal Forward/Rearward Potentiometer Feedback Circuit Short to Battery in a Lincoln?
- The code B1991 can be triggered by a short circuit in the wiring, a faulty potentiometer, or issues with the throttle control module.
3. How can I diagnose the Pedal Forward/Rearward Potentiometer Feedback Circuit Short to Battery issue in my Lincoln?
- You can use an OBDII scanner to read the specific trouble code, inspect the wiring for any visible damage, and test the potentiometer for proper functionality.
4. Can I continue driving my Lincoln with the B1991 code related to the Potentiometer Feedback Circuit Short to Battery?
- It is not recommended to drive the vehicle with this code as it can affect the throttle response and overall drivability, potentially compromising safety.
5. What are some repair tips for fixing the Pedal Forward/Rearward Potentiometer Feedback Circuit Short to Battery issue in a Lincoln?
- Repair tips include checking and repairing any damaged wiring, replacing the faulty potentiometer, and ensuring proper connections in the throttle control system.
6. How much does it typically cost to repair the B1991 code in a Lincoln caused by the Potentiometer Feedback Circuit Short to Battery?
- The cost of repairs can vary depending on the extent of the issue, but it may involve replacing the potentiometer, repairing wiring, and potentially recalibrating the throttle system.
7. Can a DIY enthusiast fix the Pedal Forward/Rearward Potentiometer Feedback Circuit Short to Battery problem in a Lincoln?
- While some basic troubleshooting can be done by DIY enthusiasts, fixing the issue often requires specialized tools and expertise, so it is recommended to seek professional help.
8. Is the B1991 OBDII code related to the Pedal Forward/Rearward Potentiometer Feedback Circuit a common problem in Lincolns?
- While not extremely common, issues with the potentiometer feedback circuit can occur in Lincolns, especially in older models or vehicles with high mileage.
9. How long does it usually take to repair the Potentiometer Feedback Circuit Short to Battery issue in a Lincoln?
- The repair time can vary depending on the exact cause of the problem, but it typically takes a few hours to a full day to diagnose and fix the issue properly.
10. Are there any preventive measures to avoid encountering the B1991 code in a Lincoln due to the Potentiometer Feedback Circuit Short to Battery?
- Regular maintenance checks, including inspecting wiring and components related to the throttle system, can help prevent issues that may lead to the B1991 trouble code.
Discuss the causes and fixes for B1991 Lincoln OBDII Code
Code B1991 Lincoln comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
