AutoCodes – GMC – P0208 2018 GMC Sierra

P0208 2018 GMC Sierra Code - Cylinder 8 Injector Control Circuit

Quick Answer

The Engine Control Module (ECM) supplies voltage to each fuel injector on the high control circuits. Common causes include Faulty Fuel Injector 8, Fuel Injector 8 harness is open or shorted, Fuel Injector 8 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: P0208 2018 GMC Sierra indicates Cylinder 8 Injector Control Circuit.
Common causes: Common causes include Faulty Fuel Injector 8, Fuel Injector 8 harness is open or shorted, Fuel Injector 8 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 191

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 Mar 23, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0208 2018 GMC Sierra Description

The Engine Control Module (ECM) supplies voltage to each fuel injector on the high control circuits. The ECM energizes each fuel injector by grounding the low control circuit of the fuel injector. The ECM monitors the status of the fuel injector circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector(s) is disabled. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the fuel injector control circuit is open for greater than 2 s.

OBDII Code P0208 2018 GMC Sierra - Cylinder 8 Injector Control Circuit - AutoCodes.com — P0208 2018 GMC Sierra Code - Cylinder 8 Injector Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0208 2018 GMC Sierra?

Faulty Fuel Injector 8
Fuel Injector 8 harness is open or shorted
Fuel Injector 8 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0208 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 P0208 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 P0208 2018 GMC Sierra code?

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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 P0208 2018 GMC Sierra Code

What does the OBDII code P0208 mean for a 2018 GMC Sierra?

P0208 indicates an issue with the cylinder 8 injector control circuit, meaning the engine control module (ECM) detected a fault in the electrical signal sent to injector 8.

What are the common symptoms of code P0208 in a 2018 GMC Sierra?

Symptoms may include rough idling, misfires, reduced fuel efficiency, engine hesitation, and the check engine light turning on.

What causes the P0208 code in a 2018 GMC Sierra?

Common causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, ECM issues, or corrosion in the electrical connections.

Can driving with code P0208 damage my 2018 GMC Sierra?

Driving with this code can lead to engine misfires and potential damage to other components over time. It’s best to address the issue promptly to avoid further problems.

How can I diagnose the P0208 code in a 2018 GMC Sierra?

Diagnosing involves inspecting the wiring and connectors for cylinder 8, testing the fuel injector with a multimeter, and possibly using a scan tool to monitor ECM signals.

Can a bad fuel injector cause the P0208 code on a 2018 GMC Sierra?

Yes, a faulty or clogged fuel injector can cause the ECM to detect a problem with the cylinder 8 injector control circuit.

How do I fix the P0208 code on my 2018 GMC Sierra?

Fixes may include repairing or replacing damaged wiring, replacing the fuel injector for cylinder 8, or addressing any ECM issues after proper diagnostics.

Is the P0208 code a common issue for the 2018 GMC Sierra?

While not extremely common, it can occur, especially if the vehicle has high mileage or if there’s wear and tear on the injector or electrical components.

How much does it cost to repair the P0208 code in a 2018 GMC Sierra?

Repair costs vary depending on the issue but may range from $100 to $500 for parts and labor, depending on whether wiring, the injector, or the ECM needs replacement.

Can a weak battery cause the P0208 code in a 2018 GMC Sierra?

A weak or failing battery can sometimes lead to inconsistent electrical signals, which may contribute to injector circuit issues like P0208.