B1640 Code - Mirror Passenger Left Circuit Open
Quick Answer
The Body Control Module (BCM) monitors the Mirror Passenger Motor. Common causes include Faulty Mirror Passenger Motor, Mirror Passenger Motor harness is open or shorted, Mirror Passenger Motor 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
- B1640 indicates Mirror Passenger Left Circuit Open.
- Common causes
- Common causes include Faulty Mirror Passenger Motor, Mirror Passenger Motor harness is open or shorted, Mirror Passenger Motor 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 B1640 Description
What are the Possible Causes of the DTC B1640?
- Faulty Mirror Passenger Motor
- Mirror Passenger Motor harness is open or shorted
- Mirror Passenger Motor circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B1640?
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 B1640 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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Information for Specific Makes
- B1640 Acura — RF Unit Not Connected
- B1640 Chrysler — Front Right Turn Control Circuit High
- B1640 Dodge — Front Right Turn Control Circuit High
- B1640 Honda — RF Unit Not Connected
- B1640 Jeep — Front Right Turn Control Circuit High
- B1640 RAM — Front Right Turn Control Circuit High
Frequently Asked Questions about B1640 Code
1. What does the OBDII code B1640 mean?
B1640 indicates an open circuit in the passenger side mirror's electrical system, typically caused by wiring or component issues.
2. What are the common symptoms of code B1640?
Symptoms may include the passenger side mirror not adjusting, folding, or functioning properly, and potential loss of heating or dimming features.
3. What causes code B1640 to appear?
This code is often caused by damaged wiring, a faulty mirror motor, a disconnected electrical connector, or a malfunctioning control module.
4. How can I diagnose the B1640 code?
Inspect the wiring and connectors for damage or disconnection, check the mirror motor for functionality, and use a multimeter to test circuit continuity.
5. Can I still drive my car with the B1640 code?
Yes, the vehicle is generally safe to drive, but there may be inconvenience due to reduced functionality of the passenger side mirror.
6. How do I fix the B1640 code?
Repair or replace damaged wiring, reconnect loose connectors, or replace the faulty mirror motor or control module as needed.
7. How much does it cost to repair the B1640 code?
The cost varies depending on the issue, ranging from under $100 for simple wiring repairs to several hundred dollars for replacing the mirror assembly or control module.
8. Can a blown fuse cause the B1640 code?
Yes, a blown fuse in the mirror circuit can cause an open circuit issue and trigger the B1640 code.
9. Is B1640 a common code?
It’s not one of the most common codes but may appear in vehicles with electrical issues related to side mirrors.
10. What tools are needed to fix the B1640 code?
You may need a multimeter, wiring repair tools, and potentially an OBDII scanner to diagnose and confirm the repair.
Discuss the causes and fixes for B1640 OBDII Code
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