Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the system that tells the car if it's in 2-wheel drive or 4-wheel drive mode. It's like if a toy car couldn't decide if it should use two wheels or four wheels to move.
The C0071 code is triggered when the vehicle's computer detects an issue with the input signal that indicates whether the vehicle is in 2-wheel drive or 4-wheel drive mode.
The C0071 code is related to the drivetrain system, specifically the sensor or switch that informs the vehicle's control module about the current drive mode (2WD or 4WD). This could involve issues with the sensor, wiring, or the control module itself.
• 4WD system not engaging or disengaging
• Warning light on the dashboard
• Inconsistent drive mode operation
• Faulty 2/4 wheel drive switch
• Damaged wiring or connectors
• Malfunctioning control module
2WD: Two-Wheel Drive
4WD: Four-Wheel Drive
• Check for any additional codes that might be present.
• Inspect the 2/4 wheel drive switch and its wiring for damage.
• Test the switch functionality with a multimeter.
• Replace the faulty 2/4 wheel drive switch.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the control module if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$150 - $500
Moderate
• Jeep Wrangler
• Ford F-150
• Toyota 4Runner
• Regularly inspect wiring and connectors for damage.
• Engage and disengage 4WD periodically to ensure proper function.
• Keep the vehicle's software updated.
Sensor Issue
• Avoid using 4WD until the issue is resolved.
• Consult with a professional mechanic for accurate diagnosis.
Check with your vehicle manufacturer for warranty coverage on drivetrain components.
This code has been known to appear in vehicles with high mileage or those frequently used in off-road conditions.
Moderate – It's important to address this issue to ensure proper vehicle operation, especially if 4WD is needed.
Driving with a malfunctioning drivetrain system can lead to unsafe driving conditions. Always ensure your vehicle is in proper working order.
• Vehicle on a flat surface
• Engine running and drive mode engaged
The 2/4 wheel drive switch is usually located on the dashboard or center console, while associated sensors and wiring are near the drivetrain.
Q: Can I drive my car with this code?
A: It's possible to drive, but you may not be able to switch between 2WD and 4WD reliably.
Q: Will this issue affect fuel economy?
A: Yes, if the vehicle is stuck in 4WD, it may consume more fuel.
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