AutoCodes – Lincoln – B12AE Lincoln

B12AE Lincoln Code - Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground

Quick Answer

The Heating, Ventilation, and Air-Conditioning (HVAC) Module contains the passenger heated seat control button and indicator. Common causes include Faulty Heater Seat Relay, Faulty Heater Mat, Heater Mat harness is open or shorted. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B12AE Lincoln indicates Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground.
Common causes: Common causes include Faulty Heater Seat Relay, Faulty Heater Mat, Heater Mat harness is open or shorted.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 823

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B12AE Lincoln Description

The Heating, Ventilation, and Air-Conditioning (HVAC) Module contains the passenger heated seat control button and indicator. The heated seat system functions independently from the climate control system. A heated seat relay is located underneath the passenger seat cushion frame. There are 2 voltage supplies to the heated seat relay. Voltage is supplied from the Smart Junction Box (SJB) heated seat relay enable circuit to the passenger heated seat relay coil when the engine is running. The ground is supplied to the opposite side of the passenger relay coil by the HVAC module from the passenger heated seat relay drive circuit when the passenger heated seat switch button is pressed to energize the relay. This closes the relay contacts to supply battery voltage from the SJB circuit to the passenger heater mat circuit. The passenger heater mats are directly connected to ground circuit completing the electrical circuit to heat the seat.

OBDII Code B12AE Lincoln - Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground - AutoCodes.com — B12AE Lincoln Code - Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground

What does this mean?

What are the Possible Causes of the DTC B12AE Lincoln?

Faulty Heater Seat Relay
Faulty Heater Mat
Heater Mat harness is open or shorted
Heater Mat circuit poor electrical connection
Faulty Heating, Ventilation, and Air-Conditioning (HVAC) Module

How to Fix the DTC B12AE 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 B12AE 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 B12AE Lincoln code?

Need more information on how to fix the B12AE Lincoln code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B12AE Lincoln 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 B12AE Lincoln Code

1. What are the common symptoms of OBDII code B12AE in a Lincoln related to the Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground?

The common symptoms include inoperative passenger heated seat, seat heating turning on and off intermittently, or a complete failure of the heated seat function.

2. What are the possible causes of the OBDII code B12AE in a Lincoln indicating a Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground?

Possible causes include a faulty heated seat relay, damaged wiring or connectors in the circuit, a short to ground in the seat heating system, or a malfunctioning seat heating control module.

3. How can I diagnose the issue related to OBDII code B12AE in a Lincoln for the Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground?

You can diagnose the problem by conducting a visual inspection of the seat heating components, testing the relay and related electrical connections with a multimeter, and performing a continuity test to identify any shorts to ground in the circuit.

4. Can I drive my Lincoln with the OBDII code B12AE indicating a Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground?

It is not recommended to drive the vehicle with this code active, as it may lead to further electrical issues or potential safety hazards related to the passenger heated seat function.

5. How can I repair the OBDII code B12AE in a Lincoln for the Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground?

To repair this issue, you may need to replace the faulty relay, repair any damaged wiring or connectors, clear the code with an OBDII scanner, and test the passenger heated seat function to ensure proper operation.

6. Is it possible to reset the OBDII code B12AE in a Lincoln related to the Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground without fixing the underlying issue?

While you can clear the code temporarily with an OBDII scanner, it is important to address the root cause of the problem to prevent the code from reoccurring and ensure the proper functioning of the seat heating system.

7. Can extreme weather conditions contribute to triggering the OBDII code B12AE in a Lincoln for the Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground?

Extreme cold or heat can potentially exacerbate existing issues with the seat heating system, leading to malfunctions that trigger the code. It is essential to address any electrical problems promptly, especially in harsh weather conditions.

8. Are there any preventive maintenance tips to avoid encountering the OBDII code B12AE in a Lincoln due to the Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground?

Regularly inspecting the seat heating components, avoiding overuse of the heated seats, and ensuring proper electrical connections can help prevent issues that may trigger the code. Conducting routine maintenance checks can also help identify potential problems early on.

9. Can a DIY enthusiast with basic automotive knowledge fix the OBDII code B12AE in a Lincoln related to the Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground?

Depending on the complexity of the issue and one's comfort level with electrical repairs, a DIY enthusiast may be able to address the problem by following repair guides, utilizing basic tools, and exercising caution when working on the seat heating system.

10. How long does it typically take to repair the OBDII code B12AE in a Lincoln indicating a Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground?

The repair time can vary based on the specific cause of the issue, the availability of replacement parts, and the individual's experience with automotive repairs. In general, addressing this code may take anywhere from a few hours to a day, depending on the circumstances.