AutoCodes – GMC – P1375 GMC

P1375 GMC Code - IC 24X Reference Circuit High Voltage

Quick Answer

This diagnostic test checks for 24X signal at a logic high condition. Common causes include Faulty Ignition Control Module, Faulty Crankshaft Sensor, Crankshaft Sensor harness is open or shorted. 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: P1375 GMC indicates IC 24X Reference Circuit High Voltage.
Common causes: Common causes include Faulty Ignition Control Module, Faulty Crankshaft Sensor, Crankshaft Sensor harness is open or shorted.
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 Popularity 4,300

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
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Code P1375 GMC Description

This diagnostic test checks for 24X signal at a logic high condition. The fault could be induced by the failure of either Crankshaft Position A or B Sensor input signal to the Ignition Control Module. Under such a condition, the Ignition Control Module would force the 24X signal high.

OBDII Code P1375 GMC - IC 24X Reference Circuit High Voltage - AutoCodes.com — P1375 GMC Code - IC 24X Reference Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1375 GMC?

Faulty Ignition Control Module
Faulty Crankshaft Sensor
Crankshaft Sensor harness is open or shorted
Crankshaft Sensor circuit poor electrical connection

How to Fix the DTC P1375 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1375 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.