AutoCodes – Ford – B12AE Ford

B12AE Ford 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 Ford 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 1,217

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 Ford 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 Ford - Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground - AutoCodes.com — B12AE Ford 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 Ford?

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 Ford?

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 Ford 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 Ford code?

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

Need Help with the Code?

Get the B12AE Ford 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 Ford Code

1. What are the common symptoms of OBDII code B12AE for Ford related to the Passenger Heated Seat Relay Drive Circuit?

The common symptoms include the passenger heated seat not functioning, the seat heating turning on/off unexpectedly, and the seat heating control panel displaying an error message.

2. What are the possible causes of the Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground issue in a Ford vehicle?

Possible causes include damaged wiring or connectors in the heated seat circuit, a faulty relay, a blown fuse, or a malfunctioning seat heating control module.

3. How can I diagnose the OBDII code B12AE for Ford related to the Passenger Heated Seat Relay Drive Circuit?

Diagnosis involves checking the wiring and connectors in the heated seat circuit for any visible damage, testing the relay for proper operation, inspecting the fuse for continuity, and scanning the seat heating control module for error codes.

4. Can I continue driving my Ford vehicle with the B12AE OBDII code for the Passenger Heated Seat Relay Drive Circuit issue?

It is not recommended to drive the vehicle with this issue as the malfunctioning heated seat system can lead to discomfort for the passenger and potentially cause further electrical problems.

5. How can I repair the Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground problem in my Ford vehicle?

Repair options include repairing or replacing damaged wiring and connectors, replacing the faulty relay, ensuring the fuse is in working condition, and if necessary, replacing the seat heating control module.

6. Are there any DIY tips for troubleshooting the B12AE OBDII code in a Ford vehicle with the Passenger Heated Seat Relay Drive Circuit problem?

DIY tips include visually inspecting the wiring and connectors for any damage, testing the relay for continuity, checking the fuse for any signs of being blown, and consulting the vehicle's manual for specific troubleshooting steps.

7. Can weather conditions or external factors contribute to the Passenger Heated Seat Relay Drive Circuit issue in a Ford vehicle?

Extreme temperatures, moisture, or physical damage to the wiring under the seat can potentially lead to the circuit being open or shorted to ground, causing the B12AE OBDII code to trigger.

8. How long does it typically take to repair the B12AE OBDII code related to the Passenger Heated Seat Relay Drive Circuit in a Ford vehicle?

The repair time can vary depending on the extent of the damage and the availability of replacement parts, but it usually takes a few hours to a day to diagnose and fix the issue.

9. Are there any recalls or technical service bulletins related to the B12AE OBDII code for Ford vehicles with the Passenger Heated Seat Relay Drive Circuit problem?

It is advisable to check with a Ford dealership or visit the manufacturer's website to see if there are any recalls or technical service bulletins specific to the B12AE OBDII code and the Passenger Heated Seat Relay Drive Circuit issue.