AutoCodes – GMC – P0202 2018 GMC Sierra

P0202 2018 GMC Sierra Code - Cylinder 2 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 2, Fuel Injector 2 harness is open or shorted, Fuel Injector 2 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: P0202 2018 GMC Sierra indicates Cylinder 2 Injector Control Circuit.
Common causes: Common causes include Faulty Fuel Injector 2, Fuel Injector 2 harness is open or shorted, Fuel Injector 2 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 307

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 P0202 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 P0202 2018 GMC Sierra - Cylinder 2 Injector Control Circuit - AutoCodes.com — P0202 2018 GMC Sierra Code - Cylinder 2 Injector Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0202 2018 GMC Sierra?

Faulty Fuel Injector 2
Fuel Injector 2 harness is open or shorted
Fuel Injector 2 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0202 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 P0202 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 P0202 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 P0202 2018 GMC Sierra Code

What does OBDII code P0202 mean for a 2018 GMC Sierra?

P0202 indicates a malfunction in the injector control circuit for cylinder 2, which may disrupt fuel delivery.

What are the common symptoms of code P0202 in a 2018 GMC Sierra?

Symptoms include rough idling, reduced engine performance, misfires, poor fuel efficiency, and possibly an illuminated check engine light.

What causes code P0202 in a 2018 GMC Sierra?

Common causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, a malfunctioning injector driver in the PCM, or issues with fuel pressure.

How can I diagnose code P0202 in a GMC Sierra?

Use an OBDII scanner to confirm the code, inspect cylinder 2's injector wiring and connectors for damage, test the injector's resistance, and check signals from the PCM.

Can a faulty fuel injector cause code P0202?

Yes, a damaged or clogged fuel injector can prevent proper operation, leading to P0202.

Is it safe to drive with code P0202 on a 2018 GMC Sierra?

Driving with P0202 may cause further damage to the engine or catalytic converter due to misfires; itâ€™s best to address the issue promptly.

How do you fix P0202 on a 2018 GMC Sierra?

Repairs may involve replacing the faulty fuel injector, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the PCM if needed.

Can low fuel pressure trigger code P0202?

Yes, insufficient fuel pressure can interfere with injector operation and may contribute to the code.

Does P0202 require replacing the PCM in a GMC Sierra?

PCM replacement is only necessary if diagnostics confirm itâ€™s not properly controlling the injector circuit and other repairs havenâ€™t resolved the issue.

What tools are needed to troubleshoot P0202 on a GMC Sierra?

Youâ€™ll need an OBDII scanner, multimeter, and possibly specialized tools for testing fuel injectors or fuel pressure.