AutoCodes – GMC – P2618 2018 GMC Sierra

P2618 2018 GMC Sierra Code - Crankshaft Position Signal Output Circuit Low Voltage

Quick Answer

The Crankshaft Position Sensor is also known as the crank position sensor is an electronic device used in an engine to record the rate at which the crankshaft is spinning. Common causes include Faulty Crankshaft Position Sensor, Crankshaft Position Sensor harness is open or shorted, Crankshaft Position Sensor 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: P2618 2018 GMC Sierra indicates Crankshaft Position Signal Output Circuit Low Voltage.
Common causes: Common causes include Faulty Crankshaft Position Sensor, Crankshaft Position Sensor harness is open or shorted, Crankshaft Position Sensor 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 165

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 21, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2618 2018 GMC Sierra Description

The Crankshaft Position Sensor is also known as the crank position sensor is an electronic device used in an engine to record the rate at which the crankshaft is spinning. This information is used by the Engine Control Module (ECM) to control ignition and fuel injection. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor.
When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field causes the voltage from the sensor to change.
The Diagnostic Trouble Code (DTC) will be set when the Crankshaft Position Signal Output Circuit is short to ground or open for greater than 5 s.

OBDII Code P2618 2018 GMC Sierra - Crankshaft Position Signal Output Circuit Low Voltage - AutoCodes.com — P2618 2018 GMC Sierra Code - Crankshaft Position Signal Output Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2618 2018 GMC Sierra?

Faulty Crankshaft Position Sensor
Crankshaft Position Sensor harness is open or shorted
Crankshaft Position Sensor circuit poor electrical connection

How to Fix the DTC P2618 2018 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 P2618 2018 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 P2618 2018 GMC Sierra 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 P2618 2018 GMC Sierra Code

1. What does the OBDII code P2618 mean on a 2018 GMC Sierra?

P2618 indicates a "Crankshaft Position Signal Output Circuit Low Voltage," meaning the signal from the crankshaft position sensor is below the expected voltage range.

2. What are the symptoms of code P2618 in a 2018 GMC Sierra?

Symptoms may include engine stalling, rough idle, difficulty starting, reduced fuel efficiency, or the engine not starting at all.

3. What causes the P2618 code on a 2018 GMC Sierra?

Common causes include a faulty crankshaft position sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module (ECM).

4. Can a bad crankshaft position sensor trigger the P2618 code?

Yes, a malfunctioning crankshaft position sensor is one of the most common causes of the P2618 code.

5. How do I diagnose the P2618 code on my 2018 GMC Sierra?

Start by checking the wiring and connectors for damage or corrosion, inspect the crankshaft position sensor, and use a multimeter to test for proper voltage and continuity in the circuit.

6. Is it safe to drive my 2018 GMC Sierra with a P2618 code?

Driving with this code can lead to engine stalling or failure to start, so itâ€™s best to address the issue promptly to avoid being stranded.

7. How do I fix the P2618 code on a GMC Sierra?

Repairs may include replacing the crankshaft position sensor, repairing damaged wiring, cleaning corroded connectors, or reprogramming/replacing the ECM if necessary.

8. Can a dead battery cause the P2618 code to appear?

While unlikely, a weak or dead battery can contribute to electrical issues that may affect the crankshaft position sensor's circuit.

9. How much does it cost to fix the P2618 code on a 2018 GMC Sierra?

Repair costs depend on the cause but may range from $100-$300 for a crankshaft position sensor replacement and more if ECM repairs are required.

10. Will clearing the P2618 code solve the issue?

Clearing the code without addressing the root cause will only temporarily remove the warning. The code will likely return until the underlying problem is fixed.