B21F7 Chrysler Code - Electronic Shifter Power Supply Circuit Short To Ground
Quick Answer
The Body Control Module (BCM) monitors the Electronic Shifter Power Supply Circuit. Common causes include Faulty Brake Lamp Switch, Brake Lamp Switch harness is open or shorted, Brake Lamp Switch 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
- B21F7 Chrysler indicates Electronic Shifter Power Supply Circuit Short To Ground.
- Common causes
- Common causes include Faulty Brake Lamp Switch, Brake Lamp Switch harness is open or shorted, Brake Lamp Switch 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 B21F7 Chrysler Description
What are the Possible Causes of the DTC B21F7 Chrysler?
- Faulty Brake Lamp Switch
- Brake Lamp Switch harness is open or shorted
- Brake Lamp Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B21F7 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B21F7 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 B21F7 Chrysler Code
1. What does the OBDII code B21F7 mean on a Chrysler vehicle?
The code B21F7 indicates an issue with the electronic shifter power supply circuit, specifically a short to ground.
2. What are the common symptoms of the B21F7 code in a Chrysler?
Symptoms may include the inability to shift gears, a non-functional electronic shifter, warning lights on the dashboard, or the vehicle being stuck in park or neutral.
3. What causes the B21F7 code to appear?
The code is typically caused by damaged wiring, a short circuit, a faulty electronic shifter module, or an issue with the power supply circuit.
4. Can I drive my Chrysler with the B21F7 code active?
Driving may be difficult or unsafe, as the electronic shifter might not operate correctly. It’s best to address the issue promptly.
5. How is the B21F7 code diagnosed?
A technician will inspect the electronic shifter power supply circuit for damaged wires, test the shifter module, and use a multimeter to check for shorts to ground.
6. What repairs are needed to fix the B21F7 code?
Repairs may include replacing damaged wiring, repairing the short circuit, or replacing the electronic shifter module if it’s defective.
7. How much does it typically cost to fix a B21F7 code on a Chrysler?
Repair costs vary but may range from $100 to $500, depending on whether wiring repairs or module replacement is needed.
8. Can a blown fuse trigger the B21F7 code?
Yes, a blown fuse in the electronic shifter circuit can cause the code, as it disrupts the power supply.
9. What tools are needed to troubleshoot the B21F7 code?
Tools like a multimeter, wiring diagram, and an OBDII scanner are essential for diagnosing the issue.
10. Can I clear the B21F7 code without fixing the problem?
The code can be cleared temporarily, but it will likely return if the underlying issue isn’t resolved.
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