P1370 — IC Module 4X Reference Circuit, Too Many Pulses

What Does P1370 Mean?

P1370 is a manufacturer-specific diagnostic trouble code: IC Module 4X Reference Circuit, Too Many Pulses. 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 P1370

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic IC Module 4X Reference readings
⚠️ Related system operating intermittently
⚠️ Reduced engine performance

Common Causes

🔍 Wiring issue in IC Module 4X Reference circuit (damaged, chafed, or corroded)
🔍 Faulty IC Module 4X Reference connector or terminal
🔍 Failed IC Module 4X Reference
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P1370 mean?

P1370 indicates: IC Module 4X Reference Circuit, Too Many Pulses. The vehicle's computer has detected that the IC Module 4X Reference is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1370?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1370 for extended periods may cause additional problems.

How much does it cost to fix P1370?

Repair costs for P1370 typically range from $80 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 repair IC Module 4X Reference wiring and connectors
🔧 Replace faulty IC Module 4X 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.

P1370: IC Module 4X Reference Circuit, Too Many Pulses