B2919 Mercury Code - Auxiliary Blower Motor Speed Input Circuit Short To Voltage
Quick Answer
Under normal operation, ground for the blower motor is provided through the circuit from the blower motor resistor (LO and MED-LO) and the blower motor speed relay 1 (MED-HI and HI). Common causes include Faulty Auxiliary Blower Motor Speed Relay 1, Auxiliary Blower Motor Speed Relay 1 harness is open or shorted, Auxiliary Blower Motor Speed Relay 1 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
- B2919 Mercury indicates Auxiliary Blower Motor Speed Input Circuit Short To Voltage.
- Common causes
- Common causes include Faulty Auxiliary Blower Motor Speed Relay 1, Auxiliary Blower Motor Speed Relay 1 harness is open or shorted, Auxiliary Blower Motor Speed Relay 1 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 B2919 Mercury Description
In LO, ground for the blower motor is provided through the blower motor resistor.
In MED-LO, blower motor speed relay 2 is grounded by the SJB through the circuit. Blower motor ground circuit is connected through one half of the blower motor resistor to the circuit. The circuit is connected through the blower motor speed relay 2 to the blower motor resistor ground circuit.
In MED-HI, blower motor speed relay 1 is grounded by the SJB through the circuit. Blower motor ground circuit is connected through blower motor speed relay 2 to the circuit. The circuit is connected through one half of the blower motor resistor to the blower motor resistor ground circuit.
In HI, blower motor speed relays 1 and 2 are grounded by the SJB through the circuit. Blower motor ground circuit 515 (OG/RD) is connected through the blower motor speed relay 1 to the circuit. The circuit is connected through the blower motor speed relay 2 to the blower motor resistor ground circuit.
What are the Possible Causes of the DTC B2919 Mercury?
- Faulty Auxiliary Blower Motor Speed Relay 1
- Auxiliary Blower Motor Speed Relay 1 harness is open or shorted
- Auxiliary Blower Motor Speed Relay 1 circuit poor electrical connection
- Faulty Blower Motor Resistor
- Faulty Smart Junction Box (SJB)
How to Fix the DTC B2919 Mercury?
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 B2919 Mercury 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 B2919 Mercury Code
1. What are the common symptoms of OBDII code B2919 Mercury (Auxiliary Blower Motor Speed Input Circuit Short To Voltage)?
- The common symptoms include the auxiliary blower motor not functioning properly, erratic blower motor speed, and possibly a blown fuse.
2. What are the potential causes of OBDII code B2919 Mercury?
- The code B2919 can be caused by a short to voltage in the auxiliary blower motor speed input circuit, a faulty blower motor speed control module, or damaged wiring.
3. How can I diagnose the OBDII code B2919 Mercury?
- To diagnose the code B2919, you can use a scan tool to read the code and perform a visual inspection of the wiring and connectors related to the auxiliary blower motor.
4. What are some repair tips for OBDII code B2919 Mercury?
- Repair tips for code B2919 may include checking and repairing any damaged wiring, replacing the blower motor speed control module if faulty, and ensuring all connectors are secure.
5. Can I drive my vehicle with OBDII code B2919 Mercury?
- It is not recommended to drive your vehicle with the code B2919 present, as it can affect the operation of the auxiliary blower motor, which is important for climate control and defogging.
6. How serious is OBDII code B2919 Mercury?
- While code B2919 is not a critical issue that will prevent your vehicle from running, it can affect the comfort and safety of your driving experience, especially in extreme weather conditions.
7. How much does it typically cost to repair OBDII code B2919 Mercury?
- The cost of repairing OBDII code B2919 can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.
8. Can I reset OBDII code B2919 Mercury without fixing the underlying issue?
- While you can clear the code temporarily, it will likely return if the underlying issue is not addressed. It is recommended to diagnose and repair the problem to prevent further issues.
9. Will OBDII code B2919 Mercury cause my check engine light to illuminate?
- Yes, OBDII code B2919 can trigger the check engine light to illuminate on your dashboard, indicating a fault with the auxiliary blower motor speed input circuit.
10. How long does it typically take to repair OBDII code B2919 Mercury?
- The repair time for code B2919 can vary depending on the extent of the issue and the availability of parts, but it may take anywhere from 1 to 3 hours for a professional mechanic to diagnose and fix the problem.
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