P1246 Code - Alternator Load Input Failed
Quick Answer
The P1246 diagnostic trouble code (DTC) indicates that the alternator load input has failed. Common causes include Faulty alternator, Loose or corroded wiring connections, Defective voltage regulator. 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
- P1246 indicates Alternator Load Input Failed.
- Common causes
- Common causes include Faulty alternator, Loose or corroded wiring connections, Defective voltage regulator.
- 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 P1246 Description
The P1246 diagnostic trouble code (DTC) indicates that the alternator load input has failed. This means that the vehicle's onboard computer system is detecting an issue with the alternator's ability to provide the necessary electrical power to the vehicle's systems. The alternator is responsible for charging the battery and providing power to the electrical components of the vehicle, such as the lights, radio, and power windows. When the alternator load input fails, it can lead to a variety of problems with the vehicle's electrical system and overall performance.
Common Causes of P1246
- Faulty alternator
- Loose or corroded wiring connections
- Defective voltage regulator
- Belt slippage or damage
- Faulty battery
Symptoms of P1246
- Dimming or flickering headlights
- Battery warning light illuminated on the dashboard
- Electrical components not functioning properly or intermittently
- Engine stalling or difficulty starting
- Reduced fuel efficiency
How to Fix P1246
- Perform a thorough inspection of the alternator, wiring, and related components to identify the source of the issue.
- Test the alternator output and voltage regulator to determine if they are functioning correctly.
- Replace any damaged or worn components, such as the alternator, voltage regulator, or wiring.
- Adjust or replace the drive belt if it is slipping or damaged.
- Test the vehicle's electrical system after repairs are completed to ensure proper functioning.
Cost to Fix P1246
The cost of repairing an alternator load input failure can vary depending on the extent of the issue and the specific components that need to be replaced. On average, the cost of replacing an alternator can range from $300 to $800, including parts and labor. Additional costs may be incurred if other components, such as the voltage regulator or wiring, need to be replaced. It's important to note that labor rates and parts prices can vary, so it's recommended to obtain a detailed estimate from a reputable auto repair shop.
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Code P1246 Information for Specific Makes
- P1246 Acura — Accelerator Pedal Position Sensor 1 Circuit Malfunction
- P1246 Audi — Needle Lift Sensor Circuit Range Performance
- P1246 Ford — Alternator Load Input Failed
- P1246 Honda — Accelerator Pedal Position Sensor 1 Circuit Malfunction
- P1246 Isuzu — Low Fuel Pressure Regulator Circuit Malfunction
- P1246 Jaguar — No Cranking Signal High Signal
- P1246 Lincoln — Alternator Load Input Failed
- P1246 Mazda — Alternator Load Input Failed
- P1246 Mercury — Alternator Load Input Failed
- P1246 Mitsubishi — Communication Error
- P1246 Saab — Intake Manifold Air Control Solenoid Inner Flap Open Circuit/Short To Ground
- P1246 Volkswagen — Needle Lift Sensor Circuit Range Performance
Frequently Asked Questions about P1246 Code
1. What are the common symptoms of OBDII code P1246 (Alternator Load Input Failed)?
- Common symptoms include dimming or flickering headlights, electrical system malfunctions, and a dead or weak battery.
2. What are the possible causes of OBDII code P1246?
- Possible causes include a faulty alternator, damaged wiring or connectors in the alternator circuit, or a malfunctioning alternator load input sensor.
3. How can I diagnose OBDII code P1246?
- Diagnosing this code usually involves checking the alternator's output voltage, inspecting the wiring and connectors for damage, and testing the alternator load input sensor for proper operation.
4. Can I still drive my vehicle with OBDII code P1246 active?
- It is not recommended to drive the vehicle with this code active, as it can lead to potential electrical system failures and battery drainage.
5. How can I repair OBDII code P1246?
- Repair methods may include replacing the alternator, repairing damaged wiring or connectors, or replacing the alternator load input sensor.
6. Will resetting the OBDII code P1246 make it go away permanently?
- Resetting the code without addressing the underlying issue will not make it go away permanently. The problem causing the code needs to be diagnosed and repaired.
7. Is it safe to continue driving if the OBDII code P1246 comes and goes intermittently?
- It is not recommended to ignore intermittent occurrences of this code, as it indicates an underlying issue that should be addressed to prevent potential electrical system failures.
8. How much does it typically cost to repair OBDII code P1246?
- The cost of repairing this code can vary depending on the specific cause, but it may range from a few hundred to over a thousand dollars, including parts and labor.
9. Can a DIY enthusiast fix OBDII code P1246, or is it best left to professionals?
- While diagnosing and repairing this code may be possible for experienced DIY enthusiasts, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair.
10. Are there any preventative maintenance tips to avoid OBDII code P1246 in the future?
- Regularly inspecting the alternator, checking the electrical system for any abnormalities, and ensuring proper battery maintenance can help prevent issues that may trigger OBDII code P1246.
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