OBD Guide
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B1DA7

Passenger Memory Mirror Module Switch Power Supply Circuit Low

B1DA7 is an OBD-II diagnostic trouble code meaning: Passenger Memory Mirror Module Switch Power Supply Circuit Low . Common causes: open or short circuit in wiring harness, oxidation of contacts. Estimated repair cost: $22–167.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$22–167 (est.)

Symptoms

  • Resetting saved mirror positions
  • Automatic mirror adjustment does not work
  • Fault indication on the dashboard

Causes

  • Open or short circuit in wiring harness
  • Oxidation of contacts
  • Bad fuse
  • Problems with the power relay
  • Internal memory module failure

How to Fix

  1. Check the condition of the fuse for the corresponding circuit
  2. Inspect the wiring harness for damage
  3. Check the voltage at the memory module contacts
  4. Test the power relay
  5. If necessary, replace the mirror memory module

Related codes

B1DA8B1DA9B1DAA

FAQ

What does the B1DA7 code mean?

B1DA7 is an OBD-II diagnostic trouble code that indicates: Passenger Memory Mirror Module Switch Power Supply Circuit Low

What causes a B1DA7 error code?

The most common causes of B1DA7 include: Open or short circuit in wiring harness; Oxidation of contacts; Bad fuse; Problems with the power relay.

How do I fix a B1DA7 diagnostic trouble code?

To fix B1DA7: Check the condition of the fuse for the corresponding circuit. Inspect the wiring harness for damage. Check the voltage at the memory module contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1DA7?

Yes, but get it checked soon

How much does it cost to fix B1DA7?

The estimated repair cost for B1DA7 is $22–167. Actual cost depends on your vehicle, location, and labor rates.

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