AutoCodes – Chevrolet – P2157 Chevrolet

P2157 Chevrolet Code - Cylinder 4 Injector High Control Circuit High Voltage

Quick Answer

The Engine Control Module (ECM) supplies voltage to each fuel injector on the high control circuits. Common causes include Faulty Fuel Injector 4, Fuel Injector 4 harness is open or shorted, Fuel Injector 4 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: P2157 Chevrolet indicates Cylinder 4 Injector High Control Circuit High Voltage.
Common causes: Common causes include Faulty Fuel Injector 4, Fuel Injector 4 harness is open or shorted, Fuel Injector 4 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 2,038

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 P2157 Chevrolet 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 high voltage supply circuit is shorted to voltage for greater than 2 s.

OBDII Code P2157 Chevrolet - Cylinder 4 Injector High Control Circuit High Voltage - AutoCodes.com — P2157 Chevrolet Code - Cylinder 4 Injector High Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2157 Chevrolet?

Faulty Fuel Injector 4
Fuel Injector 4 harness is open or shorted
Fuel Injector 4 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2157 Chevrolet?

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 P2157 Chevrolet 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 P2157 Chevrolet code?

Need more information on how to fix the P2157 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Chevrolet Models

P2157 2014 Chevrolet Silverado — Cylinder 4 Injector High Control Circuit High Voltage
P2157 2015 Chevrolet Silverado — Cylinder 4 Injector High Control Circuit High Voltage
P2157 2016 Chevrolet Silverado — Cylinder 4 Injector High Control Circuit High Voltage
P2157 2017 Chevrolet Silverado — Cylinder 4 Injector High Control Circuit High Voltage
P2157 2018 Chevrolet Silverado — Cylinder 4 Injector High Control Circuit High Voltage

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 P2157 Chevrolet Code

1. What does the OBDII code P2157 mean on a Chevrolet?

P2157 indicates a high voltage issue in the Cylinder 4 Injector High Control Circuit, meaning the fuel injector for cylinder 4 is not operating within the expected voltage range.

2. What are the common symptoms of the P2157 code on a Chevrolet?

Symptoms include rough idling, engine misfires, reduced fuel efficiency, poor acceleration, and possibly the Check Engine Light illuminating.

3. What causes the P2157 code to appear on a Chevrolet?

Common causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, a failed injector driver in the Powertrain Control Module (PCM), or corrosion in the electrical connections.

4. Can I drive my Chevrolet with the P2157 code active?

Driving with this code is not recommended as it can lead to engine performance issues and potentially damage other components over time.

5. How do I diagnose the P2157 code on my Chevrolet?

Diagnosis involves inspecting the injector wiring and connectors for damage, testing the cylinder 4 fuel injector, and checking for proper voltage and ground signals from the PCM.

6. How do I fix the P2157 code on a Chevrolet?

Repairs may include replacing the cylinder 4 fuel injector, repairing or replacing damaged wiring or connectors, or in rare cases, replacing the PCM if it is faulty.

7. How much does it cost to fix the P2157 code on a Chevrolet?

Repair costs can vary, but replacing a fuel injector typically costs $150â€“$400, while wiring repairs or PCM replacement may cost more depending on labor and parts.

8. Can a dirty fuel injector cause the P2157 code?

While a dirty injector may cause performance issues, this code specifically points to an electrical problem in the injector circuit rather than fuel flow.

9. Will resetting the Check Engine Light fix the P2157 code on a Chevrolet?

Resetting the light might temporarily clear the code, but it won't resolve the underlying issue, which could cause the code to return.

10. Can a bad PCM trigger the P2157 code on a Chevrolet?

Yes, a faulty PCM can fail to properly control the injector circuit and trigger this code, but this is less common and should be diagnosed after ruling out other causes.