B1640 Dodge Code - Front Right Turn Control Circuit High
Quick Answer
The Body Control Module (BCM) receives a communication network message from the Steering Column Control Module (SCCM) requesting turn signal lamp illumination. Common causes include Blown Front Right Park and Turn Signal Bulb, Faulty Front Right Turn Lamp, Front Right Turn Lamp harness is open or shorted. 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 Dodge indicates Front Right Turn Control Circuit High.
- Common causes
- Common causes include Blown Front Right Park and Turn Signal Bulb, Faulty Front Right Turn Lamp, Front Right Turn Lamp harness is open or shorted.
- 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 Dodge Description
What are the Possible Causes of the DTC B1640 Dodge?
- Blown Front Right Park and Turn Signal Bulb
- Faulty Front Right Turn Lamp
- Front Right Turn Lamp harness is open or shorted
- Front Right Turn Lamp circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B1640 Dodge?
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 Dodge 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 B1640 Dodge Code
1. What does the OBDII code B1640 mean on a Dodge vehicle?
B1640 indicates a problem with the Front Right Turn Control Circuit, specifically that the circuit voltage is higher than expected.
2. What are the common symptoms of a B1640 code?
Symptoms include the front right turn signal not working, flickering, or staying on constantly, and possibly a "Turn Signal Out" warning on the dashboard.
3. What causes the B1640 code to appear?
Common causes include a faulty turn signal bulb, damaged wiring or connectors, a malfunctioning turn signal switch, or a defective body control module (BCM).
4. Can a blown bulb cause the B1640 code?
Yes, a burned-out bulb or incorrect bulb type in the front right turn signal can trigger the B1640 code.
5. How do I diagnose the B1640 code?
Start by inspecting the front right turn signal bulb and socket, then check the wiring and connectors for damage, and test the turn signal switch and BCM if needed.
6. Can I still drive with a B1640 code?
While the vehicle may still be drivable, the front right turn signal not functioning properly is a safety issue and should be addressed as soon as possible.
7. How do I fix the B1640 code on a Dodge?
Replace the faulty turn signal bulb, repair or replace damaged wiring, and, if necessary, replace the turn signal switch or reprogram/replace the BCM.
8. Will clearing the code fix the B1640 issue?
Clearing the code without addressing the underlying problem will only be a temporary solution, and the code is likely to return.
9. How much does it cost to fix a B1640 code?
The cost depends on the root cause, ranging from a few dollars for a bulb replacement to higher costs for wiring repairs or BCM replacement.
10. Can a bad BCM cause the B1640 code?
Yes, a malfunctioning BCM can incorrectly detect high voltage in the turn control circuit and trigger the code.
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