P1394 — Wheel Speed Sensor 1, G-Sensor Circuit Intermittent

What Does P1394 Mean?

P1394 is a manufacturer-specific diagnostic trouble code: Wheel Speed Sensor 1, G-Sensor Circuit Intermittent. This code applies to BUICK, CADILLAC, CHEVY, CHRYSLER, GM vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of P1394

⚠️ Check Engine Light (MIL) illuminated
⚠️ Wheel Speed Sensor 1, G-Sensor signal cutting in and out
⚠️ Related system working sometimes but not consistently
⚠️ Reduced engine performance

Common Causes

🔍 Loose or intermittent connection at Wheel Speed Sensor 1, G-Sensor
🔍 Wire chafing causing intermittent contact
🔍 Wheel Speed Sensor 1, G-Sensor failing under heat or vibration
🔍 Corroded connector pins with partial contact

Frequently Asked Questions

What does P1394 mean?

P1394 indicates: Wheel Speed Sensor 1, G-Sensor Circuit Intermittent. The vehicle's computer has detected that the Wheel Speed Sensor 1, G-Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1394?

Yes, P1394 is generally safe to drive with in the short term. However, it should still be addressed to pass emissions testing and prevent potential secondary issues.

How much does it cost to fix P1394?

Repair costs for P1394 typically range from $30 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and reseat all Wheel Speed Sensor 1, G-Sensor connectors
🔧 Repair chafed or damaged wiring in Wheel Speed Sensor 1, G-Sensor circuit
🔧 Replace Wheel Speed Sensor 1, G-Sensor if failing intermittently

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P1394: Wheel Speed Sensor 1, G-Sensor Circuit Intermittent