AutoCodes – GMC – P18CB 2017 GMC Sierra

P18CB 2017 GMC Sierra Code - Parking Assist System Performance

Quick Answer

The Parking Assist Control Module communicates with the Engine Control Module (ECM) via serial data. Common causes include Faulty Parking Assist Control Module, Parking Assist Control Module harness is open or shorted, Parking Assist Control Module 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: P18CB 2017 GMC Sierra indicates Parking Assist System Performance.
Common causes: Common causes include Faulty Parking Assist Control Module, Parking Assist Control Module harness is open or shorted, Parking Assist Control Module 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.

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Code Popularity 167

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 08, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P18CB 2017 GMC Sierra Description

The Parking Assist Control Module communicates with the Engine Control Module (ECM) via serial data. The Diagnostic Trouble Code (DTC) will be set if the Engine Control Module an invalid data is received from Parking Assist Control Module

OBDII Code P18CB 2017 GMC Sierra - Parking Assist System Performance - AutoCodes.com — P18CB 2017 GMC Sierra Code - Parking Assist System Performance

What does this mean?

What are the Possible Causes of the DTC P18CB 2017 GMC Sierra?

Faulty Parking Assist Control Module
Parking Assist Control Module harness is open or shorted
Parking Assist Control Module circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P18CB 2017 GMC Sierra?

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 P18CB 2017 GMC Sierra 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 P18CB 2017 GMC Sierra code?

Need more information on how to fix the P18CB 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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.

Frequently Asked Questions about P18CB 2017 GMC Sierra Code

1. What does the OBDII code P18CB mean on a 2017 GMC Sierra?

The P18CB code indicates a performance issue with the Parking Assist System, which monitors and assists with proximity detection during parking maneuvers.

2. What are common symptoms of the P18CB code?

Symptoms may include parking assist sensors not functioning, warning messages on the dashboard, and the Parking Assist System being disabled.

3. What causes the P18CB code in a 2017 GMC Sierra?

Common causes include faulty parking sensors, damaged wiring or connectors, software glitches in the control module, or physical obstructions on the sensors.

4. How can I fix the P18CB code on my GMC Sierra?

Inspect the parking sensors for dirt or damage, check the wiring and connectors for corrosion or disconnection, and consider resetting the system or updating the software.

5. Can a dirty parking sensor trigger the P18CB code?

Yes, dirt, debris, or ice on the sensors can obstruct their function and cause the Parking Assist System to perform poorly.

6. Is it safe to drive with the P18CB code active?

Yes, but the Parking Assist System may not function properly, so extra care should be taken when parking or maneuvering in tight spaces.

7. How do I reset the Parking Assist System on a 2017 GMC Sierra?

You can try turning the vehicle off and back on, or manually disabling and re-enabling the Parking Assist feature via the infotainment system settings.

8. Can faulty wiring cause the P18CB code?

Yes, damaged or corroded wiring and connectors can disrupt communication between the sensors and the control module, triggering the code.

9. How much does it cost to repair the P18CB code?

Repair costs can vary widely, ranging from cleaning sensors for free to replacing sensors or wiring, which may cost $100-$300 or more.

10. Do I need professional help to fix the P18CB code?

If cleaning sensors and inspecting wiring doesnâ€™t resolve the issue, it may require professional diagnostics and repair to address software or hardware failures.