AutoCodes – GMC – P1652 GMC

P1652 GMC Code - Cooling Fan 2 Relay Control Circuit Conditions

Quick Answer

With the key on, the Powertrain Control Module (PCM) detects improper voltage level on ODM 'B' output 2 fault line circuit, all conditions met for 5-30 seconds (length of time to set varies by engine family) Common causes include Faulty Cooling Fan 2 Relay, Cooling Fan 2 Relay harness is open or shorted, Cooling Fan 2 Relay circuit poor electrical connection. 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: P1652 GMC indicates Cooling Fan 2 Relay Control Circuit Conditions.
Common causes: Common causes include Faulty Cooling Fan 2 Relay, Cooling Fan 2 Relay harness is open or shorted, Cooling Fan 2 Relay circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 6,232

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 05, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1652 GMC Description

OBDII Code P1652 GMC - Cooling Fan 2 Relay Control Circuit Conditions - AutoCodes.com — P1652 GMC Code - Cooling Fan 2 Relay Control Circuit Conditions

What does this mean?

What are the Possible Causes of the DTC P1652 GMC?

Faulty Cooling Fan 2 Relay
Cooling Fan 2 Relay harness is open or shorted
Cooling Fan 2 Relay circuit poor electrical connection

How to Fix the DTC P1652 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 P1652 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.

Need more information about the P1652 GMC code?

Need more information on how to fix the P1652 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1652 GMC code diagnosed by a professional: Find a repair shop in your area

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.