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P2618 2017 GMC Sierra Code - Crankshaft Position Signal Output Circuit Low Voltage

Quick Answer

The P2618 diagnostic trouble code (DTC) in a 2017 GMC Sierra indicates that there is a low voltage condition detected in the crankshaft position signal output circuit. Common causes include Faulty crankshaft position sensor, Damaged wiring or connectors in the signal output circuit, ECM malfunction. 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 2017 GMC Sierra indicates Crankshaft Position Signal Output Circuit Low Voltage.
Common causes
Common causes include Faulty crankshaft position sensor, Damaged wiring or connectors in the signal output circuit, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P2618 2017 GMC Sierra Description

The P2618 diagnostic trouble code (DTC) in a 2017 GMC Sierra indicates that there is a low voltage condition detected in the crankshaft position signal output circuit. The crankshaft position sensor is responsible for monitoring the position and speed of the crankshaft, which is crucial for the engine control module (ECM) to determine ignition timing and fuel injection. When the voltage in the signal output circuit is lower than the specified range, it can lead to various performance issues in the vehicle.

OBDII Code P2618 2017 GMC Sierra - Crankshaft Position Signal Output Circuit Low Voltage
P2618 2017 GMC Sierra Code - Crankshaft Position Signal Output Circuit Low Voltage

Common Causes of P2618 2017 GMC Sierra

  1. Faulty crankshaft position sensor
  2. Damaged wiring or connectors in the signal output circuit
  3. ECM malfunction
  4. Corrosion or poor connections in the circuit
  5. Electrical issues such as a short circuit or open circuit

Symptoms of P2618 2017 GMC Sierra

  1. Engine misfires
  2. Rough idling
  3. Stalling
  4. Difficulty starting the engine
  5. Reduced fuel efficiency

How to Fix P2618 2017 GMC Sierra

  1. Diagnose the issue by using a scan tool to read the DTC and perform a visual inspection of the crankshaft position sensor, wiring, and connectors.
  2. Test the crankshaft position sensor using a multimeter to check for proper voltage output.
  3. Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
  4. Clear the DTC and reset the ECM to see if the issue persists after repairs.
  5. If the problem persists, consider replacing the crankshaft position sensor or seeking further diagnosis from a professional mechanic.

Cost to Fix P2618 2017 GMC Sierra

The typical repair costs for addressing a P2618 code in a 2017 GMC Sierra can range from $150 to $500, depending on the specific cause of the issue and the cost of parts and labor. This estimate includes the cost of a new crankshaft position sensor, wiring repairs, and diagnostic labor. It's important to note that the actual cost may vary based on factors such as the location of the repair shop, the vehicle's make and model, and the extent of the repairs needed. Additionally, labor rates at auto repair shops can range from $80 to $150 per hour, with rates potentially higher at dealerships or in metropolitan areas. It's recommended to obtain quotes from local shops for a more accurate estimate.

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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 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P2618 in a 2017 GMC Sierra?

The common symptoms of code P2618 include rough idling, engine stalling, decreased engine performance, and the illumination of the Check Engine Light.

2. What causes the OBDII code P2618 in a 2017 GMC Sierra?

Code P2618 in a 2017 GMC Sierra is typically caused by issues with the crankshaft position sensor, wiring problems, or a faulty Engine Control Module (ECM).

3. How can I diagnose the OBDII code P2618 in my 2017 GMC Sierra?

To diagnose code P2618, you can use a diagnostic scan tool to retrieve the fault code and then perform a thorough inspection of the crankshaft position sensor, wiring, and connections for any visible damage or loose connections.

4. Can I continue driving my 2017 GMC Sierra with OBDII code P2618?

It is not recommended to continue driving your vehicle with code P2618 present, as it can lead to further engine damage or safety hazards. It is best to address the issue promptly.

5. How can I repair OBDII code P2618 in my 2017 GMC Sierra?

Repairing code P2618 involves addressing the root cause of the issue, which may include replacing the crankshaft position sensor, repairing damaged wiring, or reprogramming the ECM.

6. Is it possible to reset OBDII code P2618 in a 2017 GMC Sierra without repairs?

While you can clear the code using a diagnostic scan tool, it is not recommended to reset the code without addressing the underlying issue, as it is likely to reoccur.

7. Are there any DIY tips for fixing OBDII code P2618 in a 2017 GMC Sierra?

DIY tips for addressing code P2618 include checking the sensor connections for corrosion, ensuring proper sensor alignment, and inspecting the wiring harness for any visible damage.

8. Can a faulty battery or alternator cause OBDII code P2618 in a 2017 GMC Sierra?

While a faulty battery or alternator can cause electrical issues, they are not common culprits for code P2618. Focus on inspecting the crankshaft position sensor and related components first.

9. Will code P2618 prevent my 2017 GMC Sierra from passing an emissions test?

Yes, having an active code like P2618 can cause your GMC Sierra to fail an emissions test, as it indicates a problem with the vehicle's emission control system.

10. How much should I expect to pay for professional repair of OBDII code P2618 in my 2017 GMC Sierra?

The cost of professional repair for code P2618 can vary depending on the exact cause of the issue, but expect to pay anywhere from $150 to $500 for parts and labor.

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