P1397 — Wheel Speed Sensor 2, G-Sensor Circuit Low Voltage

What Does P1397 Mean?

P1397 is a manufacturer-specific diagnostic trouble code: Wheel Speed Sensor 2, G-Sensor Circuit Low Voltage. This code applies to BUICK, CADILLAC, CHEVY, CHRYSLER, JAGUAR 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 P1397

⚠️ Check Engine Light (MIL) illuminated
⚠️ Wheel Speed Sensor 2, G-Sensor reading at zero or minimum value
⚠️ Related system not functioning or in fail-safe mode
⚠️ Reduced engine performance

Common Causes

🔍 Open or broken wire in Wheel Speed Sensor 2, G-Sensor circuit
🔍 Poor ground connection at Wheel Speed Sensor 2, G-Sensor
🔍 Faulty Wheel Speed Sensor 2, G-Sensor with no output signal
🔍 Disconnected or loose Wheel Speed Sensor 2, G-Sensor connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does P1397 mean?

P1397 indicates: Wheel Speed Sensor 2, G-Sensor Circuit Low Voltage. The vehicle's computer has detected that the Wheel Speed Sensor 2, G-Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1397?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1397 for extended periods may cause additional problems.

How much does it cost to fix P1397?

Repair costs for P1397 typically range from $20 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

🔧 Repair broken wire or restore ground in Wheel Speed Sensor 2, G-Sensor circuit
🔧 Clean and secure Wheel Speed Sensor 2, G-Sensor connector and ground points
🔧 Replace failed Wheel Speed Sensor 2, G-Sensor

1
Find your vehicle above
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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.

P1397: Wheel Speed Sensor 2, G-Sensor Circuit Low Voltage