AutoCodesGeneric – B1D33

B1D33 Code - Driver Mirror Heater Control Circuit Low

Quick Answer

If the Driver Memory Mirror Module senses an excessive current draw on the Driver Mirror Heater Driver circuit within 10 ms of turning on the Mirror Heater Driver Output. Common causes include Faulty Driver Mirror Heater, Driver Mirror Heater harness is open or shorted, Driver Mirror Heater 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
B1D33 indicates Driver Mirror Heater Control Circuit Low.
Common causes
Common causes include Faulty Driver Mirror Heater, Driver Mirror Heater harness is open or shorted, Driver Mirror Heater 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 1,043
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 28, 2019
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Code B1D33 Description

If the Driver Memory Mirror Module senses an excessive current draw on the Driver Mirror Heater Driver circuit within 10 ms of turning on the Mirror Heater Driver Output.
OBDII Code B1D33 - Driver Mirror Heater Control Circuit Low - AutoCodes.com
B1D33 Code - Driver Mirror Heater Control Circuit Low

What are the Possible Causes of the DTC B1D33?

  • Faulty Driver Mirror Heater
  • Driver Mirror Heater harness is open or shorted
  • Driver Mirror Heater circuit poor electrical connection
  • Faulty Driver Memory Mirror Module

How to Fix the DTC B1D33?

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 B1D33 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.

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Information for Specific Makes

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 B1D33 Code

1. What does the OBDII code B1D33 mean?

The B1D33 code indicates a problem in the driver mirror heater control circuit, specifically that the circuit voltage is lower than expected.

2. What are the common symptoms of a B1D33 code?

Symptoms include the driver-side mirror heater not functioning, difficulty defrosting the mirror, or a visible warning light on the dashboard.

3. What causes the B1D33 code to appear?

Common causes include a damaged mirror heater element, faulty wiring or connectors, a blown fuse, or a malfunctioning control module.

4. How can I diagnose a B1D33 code?

Start by inspecting the wiring and connectors for damage or corrosion, checking the fuse for the mirror heater circuit, and testing the mirror heating element for continuity.

5. Can I still use my car if it has a B1D33 code?

Yes, the car is still drivable, but the driver-side mirror defroster will not work, which may reduce visibility in cold or foggy conditions.

6. How can I fix a B1D33 code?

Repairs may include replacing damaged wiring, repairing or replacing the mirror heater element, or addressing issues with the control module if necessary.

7. How much does it typically cost to repair a B1D33 code?

Repair costs depend on the issue but may range from $50 to $200 for wiring repairs or mirror element replacement. Control module repairs could cost more.

8. Can a blown fuse cause a B1D33 code?

Yes, a blown fuse in the mirror heater circuit can result in this code by interrupting power to the heater.

9. What tools are needed to troubleshoot a B1D33 code?

You’ll need a digital multimeter to check for voltage and continuity, an OBDII scanner to clear the code, and possibly a wiring diagram for your vehicle.

10. Can the B1D33 code clear itself?

The code may clear itself if the issue is intermittent and resolves on its own, but it’s best to diagnose and repair the problem to prevent recurrence.

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