B21F7 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 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 Description
What are the Possible Causes of the DTC B21F7?
- 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?
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 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
- B21F7 Chrysler — Electronic Shifter Power Supply Circuit Short To Ground
- B21F7 Dodge — Electronic Shifter Power Supply Circuit Short To Ground
- B21F7 Jeep — Electronic Shifter Power Supply Circuit Short To Ground
- B21F7 RAM — Electronic Shifter Power Supply Circuit Short To Ground
Frequently Asked Questions about B21F7 Code
1. What are common symptoms of OBDII code B21F7 (Electronic Shifter Power Supply Circuit Short To Ground)?
The common symptoms include the inability to shift gears, the gear indicator not working properly, and dashboard warning lights related to the transmission system.
2. What causes the OBDII code B21F7 to be triggered?
The code B21F7 is typically triggered by a short circuit between the electronic shifter power supply circuit and the ground, often due to damaged wiring or faulty components.
3. How can I diagnose the issue related to OBDII code B21F7?
Diagnosing the issue involves using a diagnostic scanner to retrieve the trouble codes, inspecting the wiring harness for any visible damage, and testing the electronic shifter power supply circuit for continuity and shorts.
4. What are some repair tips for fixing OBDII code B21F7?
Repair tips include repairing or replacing any damaged wiring, checking and repairing connectors, ensuring proper grounding, and replacing any faulty components in the electronic shifter power supply circuit.
5. Can I drive my vehicle with the OBDII code B21F7 present?
It is not recommended to drive the vehicle with the code B21F7 present as it can lead to transmission issues and potentially cause further damage to the electronic shifter system.
6. How much does it cost to repair OBDII code B21F7?
The cost of repairing OBDII code B21F7 can vary depending on the extent of the damage and the specific components that need to be replaced. It is advisable to consult a professional mechanic for an accurate estimate.
7. Are there any safety concerns associated with OBDII code B21F7?
Yes, there are safety concerns as the code B21F7 can affect the proper functioning of the transmission system, leading to potential safety hazards while driving.
8. Can I reset the OBDII code B21F7 on my own?
While you can reset the code using a diagnostic scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.
9. Is OBDII code B21F7 specific to certain vehicle makes and models?
The OBDII code B21F7 related to the Electronic Shifter Power Supply Circuit Short To Ground can be found in various vehicle makes and models equipped with an electronic shifter system.
10. How urgent is it to address OBDII code B21F7?
It is recommended to address OBDII code B21F7 promptly to prevent further damage to the transmission system and ensure the safe operation of the vehicle.
Discuss the causes and fixes for B21F7 OBDII Code
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