B1644
Low Severity (Level 1)Mirror Passenger Right Circuit Open
B1644 usually means mirror Passenger Right Circuit Open.
Can you still drive with B1644?
✅Safe to drive — this is an informational or minor issue. Schedule diagnosis at your convenience.
Typical repair cost: $60 – $400
Severity Level 1 — Low
This code indicates a minor issue that is unlikely to cause immediate driveability problems. You can typically continue driving but should have the vehicle inspected at your earliest convenience.
Common Symptoms
- Power mirrors working intermittently, then stopping completely
- Mirror defrost/heater not working
- Power mirrors not working — no response when activated
- Infinite resistance in the power mirror circuit — broken wire or disconnected connector
Possible Causes
- Broken wire or connector pin in the power mirror system harness — common at flex points like door jambs or where wiring moves
- Disconnected or loose electrical connector — may have been bumped during other repairs
- Failed mirror motor — internal open circuit from age, heat cycling, or vibration
- Corrosion completely severing a wire or connector terminal — green crust on copper wiring
- Wiring harness damage from rodent chewing — look for nesting material near the engine or under dash
Common Fixes
- Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($35-91 at shop, free at auto parts store for basic scan)
- Visually inspect the power mirror system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $89 diagnostic fee at shop)
- Trace the power mirror system wiring from connector to connector with a multimeter set to continuity/resistance mode — find and repair the break in the circuit ($134-235 labor for diagnosis and repair)
- Check and reseat all connectors in the power mirror system circuit — disconnect, inspect pins, clean with electrical contact cleaner, apply dielectric grease, and reconnect firmly ($14 DIY or $56 shop minimum)
- If mirror motor has failed internally (open circuit inside), replace it — don't try to repair sealed components ($50-400)
Estimated Repair Cost
These are estimated costs based on generic repair data. Actual costs may vary depending on your vehicle, location, and labor rates.
Frequently Asked Questions
What does B1644 mean?
B1644 stands for "Mirror Passenger Right Circuit Open". B1644 usually means mirror Passenger Right Circuit Open.
Can you drive with B1644?
Safe to drive — this is an informational or minor issue. Schedule diagnosis at your convenience.
How much does it cost to fix B1644?
Repair costs for B1644 typically range from $60 to $400, depending on your vehicle make, model, and local labor rates. Common fixes include: Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($35-91 at shop, free at auto parts store for basic scan); Visually inspect the power mirror system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $89 diagnostic fee at shop); Trace the power mirror system wiring from connector to connector with a multimeter set to continuity/resistance mode — find and repair the break in the circuit ($134-235 labor for diagnosis and repair).
Will B1644 clear itself?
Explore Repair Costs
Related OBD-II Codes
These codes are in the same range as B1644 and often share similar causes and fixes.
Worried about repair costs?
Get transparent estimates and verify your mechanic's quote before authorizing repairs.
Related Discussions
See what other car owners are saying about this code and related repairs.
View B1644 discussions in the community