B1812 Jeep Code - Passenger Door Ajar Circuit Short
Quick Answer
The Body Control Module (BCM) monitors the Door Ajar Switch Sense. Common causes include Faulty Door Ajar Switch Sense, Door Ajar Switch Sense harness is open or shorted, Door Ajar Switch Sense 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
- B1812 Jeep indicates Passenger Door Ajar Circuit Short .
- Common causes
- Common causes include Faulty Door Ajar Switch Sense, Door Ajar Switch Sense harness is open or shorted, Door Ajar Switch Sense 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 B1812 Jeep Description
What are the Possible Causes of the DTC B1812 Jeep?
- Faulty Door Ajar Switch Sense
- Door Ajar Switch Sense harness is open or shorted
- Door Ajar Switch Sense circuit poor electrical connection
- Faulty Door Latch Assembly
- Faulty Body Control Module (BCM)
How to Fix the DTC B1812 Jeep?
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.
Code Tech Notes
B1812-15 PASSENGER DOOR AJAR CIRCUIT SHORT TO BATTERY OR OPEN
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1812 Jeep 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 B1812 Jeep Code
1. What does the OBDII code B1812 mean on a Jeep?
The B1812 code indicates a "Passenger Door Ajar Circuit Short," meaning there is an electrical issue in the circuit responsible for detecting whether the passenger door is open or closed.
2. What are the common symptoms of the B1812 code?
Symptoms include the "door ajar" warning staying on, interior lights remaining illuminated, or the door locks not functioning properly.
3. What causes the B1812 code on a Jeep?
Common causes include damaged wiring, a short circuit in the door ajar switch, faulty connectors, or a malfunctioning passenger door latch assembly.
4. Can driving with the B1812 code cause further damage?
While it may not directly harm the vehicle, unresolved electrical issues could lead to drained batteries or more extensive electrical problems over time.
5. How do I diagnose the B1812 code?
Diagnosis involves checking the door ajar switch, inspecting the wiring and connectors for damage or corrosion, and using a multimeter to test for continuity or shorts in the circuit.
6. Can I fix the B1812 code myself?
If you're comfortable with basic electrical repairs, you can inspect and replace damaged wires, connectors, or the door ajar switch. Otherwise, consult a mechanic for assistance.
7. How much does it cost to repair the B1812 code?
Repair costs vary but could range from $50 to $200 for parts and labor, depending on whether the issue is with the switch, wiring, or latch assembly.
8. Does the B1812 code affect the operation of the passenger door?
In most cases, the passenger door will still function mechanically, but the electrical issue may impact features like automatic locking or interior lighting.
9. How can I prevent the B1812 code from recurring?
Regularly inspect door wiring and switches for wear or corrosion, avoid slamming doors, and promptly address any electrical issues that arise.
10. Is a professional scan tool necessary to clear the B1812 code?
Yes, after repairs are made, a professional scan tool is typically needed to clear the code and ensure the issue is resolved.
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