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Engine-Codes – Generic – B12AE

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

Quick Answer

The B12AE diagnostic trouble code (DTC) indicates that there is an issue with the passenger heated seat relay drive circuit being open or shorted to ground. Common causes include Faulty relay drive circuit, Wiring issues such as a short circuit or open circuit, Defective heated seat control module. 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
B12AE indicates Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground.
Common causes
Common causes include Faulty relay drive circuit, Wiring issues such as a short circuit or open circuit, Defective heated seat control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code B12AE Description

The B12AE diagnostic trouble code (DTC) indicates that there is an issue with the passenger heated seat relay drive circuit being open or shorted to ground. This code specifically relates to the circuit responsible for controlling the passenger-side heated seat in the vehicle. When this circuit is open or shorted to ground, it can result in the passenger heated seat not functioning properly or at all.

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

Common Causes of B12AE

  1. Faulty relay drive circuit.
  2. Wiring issues such as a short circuit or open circuit.
  3. Defective heated seat control module.
  4. Corrosion or damage to connectors in the circuit.
  5. Issues with the heating element in the seat cushion.

Symptoms of B12AE

  1. Passenger heated seat not warming up.
  2. Inconsistent heating in the passenger seat.
  3. Illumination of the heated seat indicator light on the dashboard.
  4. Burning smell or smoke coming from the seat when attempting to use the heated function.
  5. Fuse related to the heated seat circuit blowing repeatedly.

How to Fix B12AE

  1. Begin by diagnosing the specific cause of the issue using a multimeter to test the relay drive circuit, wiring, and components for continuity and proper voltage.
  2. Check for any visible damage to the wiring, connectors, or components in the circuit.
  3. Replace any faulty relays, wiring, or connectors as needed.
  4. Test the repaired circuit to ensure that the passenger heated seat is functioning correctly.
  5. Clear the DTC from the vehicle's memory using a diagnostic scan tool.

Cost to Fix B12AE

The cost of repairing a passenger heated seat relay drive circuit open or shorted to ground issue can vary depending on the specific cause of the problem. On average, the parts required for this repair may range from $50 to $200, while labor costs can add an additional $100 to $300. Overall, the total repair cost could fall between $150 and $500. Keep in mind that these are rough estimates, and actual costs may differ based on the vehicle's make and model, as well as the labor rates in your area. It's recommended to consult with a qualified mechanic or repair shop for a more accurate cost estimate.

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Code B12AE Information for Specific Makes

  • B12AE Ford — Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground
  • B12AE Lincoln — Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground
  • B12AE Mercury — Passenger Heated Seat Relay Drive Circuit Open Or Shorted to Ground
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 Code

1. What are the common symptoms of OBDII code B12AE?

- Common symptoms include a non-functioning passenger heated seat, illuminated warning light on the dashboard, and possible issues with the seat's heating system.

2. What causes the OBDII code B12AE to trigger?

- This code is triggered when the PCM (powertrain control module) detects an open or short circuit to ground in the passenger heated seat relay drive circuit.

3. How can I diagnose the cause of the OBDII code B12AE?

- Diagnosis typically involves checking the wiring and connections related to the passenger heated seat relay, testing the relay itself, and inspecting the seat heating elements for any damage or faults.

4. What are some repair tips for resolving OBDII code B12AE?

- Repair tips may include repairing or replacing damaged wiring, ensuring proper connections, replacing a faulty relay, and addressing any issues with the seat heating elements.

5. Is it safe to continue driving with OBDII code B12AE active?

- It is generally safe to drive with this code active, but it's important to address the underlying issue to restore the functionality of the passenger heated seat and prevent any potential electrical problems.

6. Can I fix the OBDII code B12AE issue myself, or do I need a professional mechanic?

- Depending on your skill level and experience with automotive electrical systems, you may be able to troubleshoot and repair the issue yourself. However, if you are unsure or uncomfortable working with electrical components, it's best to consult a professional mechanic.

7. Are there any common mistakes people make when trying to resolve OBDII code B12AE?

- Common mistakes include overlooking simple wiring issues, failing to properly test the relay, and misdiagnosing the problem as a seat heating element failure.

8. How much does it typically cost to fix OBDII code B12AE at a repair shop?

- The cost of fixing this code can vary depending on the specific issue, the labor rates of the repair shop, and whether any parts need to be replaced. It's best to get a diagnostic assessment from a trusted mechanic for an accurate estimate.

9. Will resetting the OBDII code B12AE clear the issue permanently?

- Resetting the code may temporarily turn off the warning light, but if the underlying problem is not addressed, the code is likely to reappear. It's important to diagnose and fix the root cause of the issue to prevent it from recurring.

10. Can the OBDII code B12AE affect other systems in the vehicle?

- While this code specifically relates to the passenger heated seat relay drive circuit, electrical issues in one part of the vehicle can sometimes have secondary effects on other systems. It's important to address the issue promptly to avoid potential complications.

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