B1564
Low Severity (Level 1)Door Ajar Circuit Open
B1564 usually means door Ajar Circuit Open.
Can you still drive with B1564?
✅Safe to drive — this is an informational or minor issue. Schedule diagnosis at your convenience.
Typical repair cost: $90 – $600
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 door locks not working — no response when activated
- Door locks cycling (locking/unlocking) on their own while driving
- Power door locks not responding to key fob or interior switch
- Infinite resistance in the power door lock/latch circuit — broken wire or disconnected connector
Possible Causes
- Broken wire or connector pin in the power door lock/latch 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 door lock actuator — 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
- Broken wire in the door jamb wiring boot — harness flexes every time the door opens, eventually wires break inside the rubber boot
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 ($42-94 at shop, free at auto parts store for basic scan)
- Visually inspect the power door lock/latch system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $127 diagnostic fee at shop)
- Trace the power door lock/latch system wiring from connector to connector with a multimeter set to continuity/resistance mode — find and repair the break in the circuit ($90-472 labor for diagnosis and repair)
- Check and reseat all connectors in the power door lock/latch system circuit — disconnect, inspect pins, clean with electrical contact cleaner, apply dielectric grease, and reconnect firmly ($11 DIY or $83 shop minimum)
- If door lock actuator has failed internally (open circuit inside), replace it — don't try to repair sealed components ($80-500)
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 B1564 mean?
B1564 stands for "Door Ajar Circuit Open". B1564 usually means door Ajar Circuit Open.
Can you drive with B1564?
Safe to drive — this is an informational or minor issue. Schedule diagnosis at your convenience.
How much does it cost to fix B1564?
Repair costs for B1564 typically range from $90 to $600, 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 ($42-94 at shop, free at auto parts store for basic scan); Visually inspect the power door lock/latch system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $127 diagnostic fee at shop); Trace the power door lock/latch system wiring from connector to connector with a multimeter set to continuity/resistance mode — find and repair the break in the circuit ($90-472 labor for diagnosis and repair).
Will B1564 clear itself?
Explore Repair Costs
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