B1566 Code - Door Ajar Circuit Short To Ground
Quick Answer
The Body Control Module (BCM) monitors the Door Ajar Switch. Common causes include Faulty Door Ajar Switch, Door Ajar Switch harness is open or shorted, Door Ajar Switch 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
- B1566 indicates Door Ajar Circuit Short To Ground.
- Common causes
- Common causes include Faulty Door Ajar Switch, Door Ajar Switch harness is open or shorted, Door Ajar Switch 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.
Code B1566 Description
What are the Possible Causes of the DTC B1566?
- Faulty Door Ajar Switch
- Door Ajar Switch harness is open or shorted
- Door Ajar Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B1566?
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 B1566 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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Frequently Asked Questions about B1566 Code
1. What does the OBDII code B1566 mean?
B1566 indicates a "Door Ajar Circuit Short To Ground," meaning there is an electrical issue causing the door ajar sensor to malfunction.
2. What are the symptoms of code B1566?
Common symptoms include the door ajar warning staying on, interior lights staying illuminated, or a chime sounding continuously while driving.
3. What causes the B1566 code to appear?
This code is typically caused by a short to ground in the door ajar circuit, damaged wiring, a faulty door ajar switch, or corrosion in the electrical connections.
4. Can a B1566 code drain my battery?
Yes, if the interior lights stay on due to this code, it can lead to battery drain over time.
5. How can I diagnose the B1566 code?
Start by inspecting the door ajar switch, wiring, and connectors for damage, corrosion, or loose connections. Use a multimeter to test the circuit for continuity and shorts.
6. Can I drive with the B1566 code active?
While you can drive with this code, it may cause distractions from warning chimes or lights, and unresolved issues could lead to further electrical problems.
7. How is the B1566 code repaired?
Repairs may involve fixing or replacing damaged wiring, cleaning corroded connections, or replacing a faulty door ajar switch.
8. Does the B1566 code only affect one door?
Not necessarily. The code may be specific to one door’s circuit, but it’s important to check all door ajar sensors and wiring to ensure proper function.
9. How much does it cost to fix the B1566 code?
Repair costs vary depending on the issue but typically range from $50 to $200 for labor and parts, such as a new door ajar switch.
10. Will clearing the B1566 code fix the issue?
No, clearing the code will not fix the underlying problem. The fault must be diagnosed and repaired to prevent the code from returning.
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