P1323 — 24X Reference Circuit Low Frequency

What Does P1323 Mean?

P1323 is a manufacturer-specific diagnostic trouble code: 24X Reference Circuit Low Frequency. 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 P1323

⚠️ Check Engine Light (MIL) illuminated
⚠️ 24X Reference 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 24X Reference circuit
🔍 Poor ground connection at 24X Reference
🔍 Faulty 24X Reference with no output signal
🔍 Disconnected or loose 24X Reference connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does P1323 mean?

P1323 indicates: 24X Reference Circuit Low Frequency. The vehicle's computer has detected that the 24X Reference is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1323?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1323 for extended periods may cause additional problems.

How much does it cost to fix P1323?

Repair costs for P1323 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 24X Reference circuit
🔧 Clean and secure 24X Reference connector and ground points
🔧 Replace failed 24X Reference

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.

P1323: 24X Reference Circuit Low Frequency