P1646 Dodge Code - Vehicle Theft System Improper Password
Quick Answer
The P1646 diagnostic trouble code for Dodge vehicles indicates a problem with the vehicle theft system's improper password. Common causes include Faulty key fob battery, Damaged wiring or connections in the immobilizer system, Malfunctioning immobilizer control module. 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
- P1646 Dodge indicates Vehicle Theft System Improper Password.
- Common causes
- Common causes include Faulty key fob battery, Damaged wiring or connections in the immobilizer system, Malfunctioning immobilizer control module.
- 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.
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Code P1646 Dodge Description
The P1646 diagnostic trouble code for Dodge vehicles indicates a problem with the vehicle theft system's improper password. This code is typically triggered when the vehicle's immobilizer system fails to recognize the correct password or key fob signal, preventing the engine from starting. The vehicle theft system is designed to prevent unauthorized individuals from starting the vehicle without the correct key or password, enhancing security.
Common Causes of P1646 Dodge
- Faulty key fob battery
- Damaged wiring or connections in the immobilizer system
- Malfunctioning immobilizer control module
- Weak or failing vehicle battery
- Issues with the vehicle's electrical system
Symptoms of P1646 Dodge
- Engine cranks but does not start
- Security light flashing on the dashboard
- Inability to start the vehicle with the correct key or key fob
- Intermittent starting issues
How to Fix P1646 Dodge
- Replace the key fob battery
- Inspect and repair any damaged wiring or connections in the immobilizer system
- Replace the immobilizer control module if necessary
- Test and replace the vehicle battery if it is weak or failing
- Check and repair any issues with the vehicle's electrical system
Cost to Fix P1646 Dodge
The typical repair costs for addressing a P1646 code can vary depending on the specific cause of the issue. In general, replacing a key fob battery may cost around $5-$20, while repairing damaged wiring or connections in the immobilizer system can range from $100-$300. Replacing an immobilizer control module may cost between $200-$500, and testing and replacing a vehicle battery can range from $100-$200.
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