P1390 Honda Code - G-Sensor Intermittent Voltage Low
Quick Answer
The P1390 Honda code indicates a problem with the G-Sensor, specifically an intermittent low voltage issue. Common causes include Damaged or faulty G-Sensor wiring or connectors, Corrosion or moisture ingress in the G-Sensor connections, Impact or physical damage to the G-Sensor unit. 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
- P1390 Honda indicates G-Sensor Intermittent Voltage Low.
- Common causes
- Common causes include Damaged or faulty G-Sensor wiring or connectors, Corrosion or moisture ingress in the G-Sensor connections, Impact or physical damage to the G-Sensor unit.
- 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 P1390 Honda Description
The P1390 Honda code indicates a problem with the G-Sensor, specifically an intermittent low voltage issue. The G-Sensor, or gravity sensor, is a crucial component in the vehicle's safety systems, particularly in vehicles equipped with stability control or traction control systems. The G-Sensor measures the vehicle's acceleration forces and helps determine the vehicle's orientation. When the G-Sensor detects a sudden change in acceleration, it sends signals to the vehicle's computer system to trigger appropriate responses, such as activating stability control to prevent skidding.
Common Causes of P1390 Honda
- Damaged or faulty G-Sensor wiring or connectors.
- Corrosion or moisture ingress in the G-Sensor connections.
- Impact or physical damage to the G-Sensor unit.
- Electrical issues in the vehicle's wiring harness affecting the G-Sensor signals.
- Malfunctioning G-Sensor unit due to internal faults or wear and tear.
Symptoms of P1390 Honda
- Illumination of the traction control or stability control warning light on the dashboard.
- Erratic behavior of the stability control system, such as unintended activation or deactivation.
- Reduced fuel efficiency due to improper functioning of the traction control system.
- Unusual noises or vibrations coming from the vehicle, especially during acceleration or braking.
How to Fix P1390 Honda
- Begin by conducting a visual inspection of the G-Sensor wiring and connectors to check for any damage or corrosion. Repair or replace any damaged components.
- Use a multimeter to test the voltage output of the G-Sensor and compare it to the manufacturer's specifications. Replace the G-Sensor unit if the voltage is consistently low.
- Check the G-Sensor unit for any physical damage and replace it if necessary.
- Clear the diagnostic trouble codes from the vehicle's computer system using a scan tool and perform a road test to ensure the issue has been resolved.
- If the problem persists, consult a professional mechanic or dealership for further diagnosis and potential replacement of the G-Sensor unit.
Cost to Fix P1390 Honda
The typical repair costs for addressing a P1390 Honda code related to the G-Sensor intermittent voltage low issue can vary depending on the specific cause of the problem. In general, the cost of replacing a G-Sensor unit can range from $100 to $300, including parts and labor. Additional diagnostic fees may apply, and the total cost can increase if other related components need to be replaced or repaired. It's advisable to consult with a trusted mechanic or dealership to obtain a more accurate estimate based on the vehicle's make and model, as well as the extent of the repair required. Keep in mind that labor rates at auto repair shops can vary, so it's recommended to inquire about specific rates in your area.
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