Driver Door Ajar Circuit Malfunction
What does B1011 mean?
The B1011 code means the vehicle's onboard diagnostic system has detected: Driver Door Ajar Circuit Malfunction. This is a low severity code.
Common Symptoms
- Door ajar warning stays on with door closed
- Dome light stays on continuously
- Door ajar chime will not stop
- Vehicle security system not arming
- Remote start will not engage
Probable Causes (Ranked by Likelihood)
- Faulty driver door jamb switch Very High
- Misaligned driver door or striker High
- Corroded door ajar switch wiring Moderate
- Body control module input fault Low
Step-by-Step Diagnostic Procedure
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Scan BCM for door ajar related DTCs
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Test driver door jamb switch manually and with scan tool
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Check door alignment and latch engagement
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Inspect wiring at door jamb switch for damage
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Verify BCM reads correct door status
Frequently Asked Questions
Why does my door ajar light stay on when the door is closed?
The most common cause is a failed or stuck door jamb switch. These small plunger-type switches can get stuck from dirt, corrosion, or wear, sending a constant open signal to the BCM.
Can a door ajar warning drain my battery?
Yes. If the dome light and other interior lights stay on because of a false door ajar signal, they can drain the battery overnight.
Why won't my remote start work with this code?
Most remote start systems require all doors to be closed before they will activate. A false door ajar signal will prevent the system from engaging as a safety precaution.