B1812 Chrysler 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 Chrysler 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 Chrysler Description
What are the Possible Causes of the DTC B1812 Chrysler?
- 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 Chrysler?
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 Chrysler 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 Chrysler Code
1. What does the OBDII code B1812 mean on a Chrysler?
B1812 indicates a "Passenger Door Ajar Circuit Short," meaning there's an electrical issue in the circuit that detects whether the passenger door is open or closed.
2. What are the symptoms of the B1812 code?
Common symptoms include the "door ajar" warning light staying on, interior dome lights remaining on, or the vehicle failing to lock properly.
3. What causes the B1812 code to appear?
The most common causes are damaged wiring, a faulty door ajar switch, corroded connectors, or a short circuit in the passenger door ajar circuit.
4. Can I drive with the B1812 code active?
Yes, but it may cause inconvenience, such as constant warning lights or battery drain due to interior lights staying on. It's best to address it promptly.
5. How do I diagnose the B1812 code?
Start by inspecting the wiring and connectors in the passenger door for damage or corrosion. Use a multimeter to check for shorts or continuity in the circuit.
6. How do I fix the B1812 code?
Repairs may involve replacing damaged wiring, cleaning corroded connectors, or replacing a faulty door ajar switch in the passenger door.
7. How much does it cost to fix the B1812 code?
The cost depends on the issue, ranging from $50-$150 for a switch replacement to $200 or more if extensive wiring repairs are needed.
8. Can a faulty door latch cause the B1812 code?
Yes, if the door latch assembly contains the door ajar switch, damage or malfunction in the latch can trigger the code.
9. Will clearing the B1812 code fix the problem?
Clearing the code may remove the warning temporarily, but if the underlying issue isn’t addressed, the code will return.
10. Can the B1812 code drain my battery?
Yes, if the "door ajar" circuit causes interior lights to stay on, it can lead to battery drain if left unresolved.
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