AutoCodes – Chevrolet – P2156 2014 Chevrolet Silverado

P2156 2014 Chevrolet Silverado Code - Cylinder 4 Injector High Control Circuit Low 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: P2156 2014 Chevrolet Silverado indicates Cylinder 4 Injector High Control Circuit Low 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 466

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 08, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2156 2014 Chevrolet Silverado 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 ground for greater than 2 s.

OBDII Code P2156 2014 Chevrolet Silverado - Cylinder 4 Injector High Control Circuit Low Voltage - AutoCodes.com — P2156 2014 Chevrolet Silverado Code - Cylinder 4 Injector High Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2156 2014 Chevrolet Silverado?

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 P2156 2014 Chevrolet Silverado?

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 P2156 2014 Chevrolet Silverado 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 P2156 2014 Chevrolet Silverado code?

Need more information on how to fix the P2156 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P2156 2014 Chevrolet Silverado Code

1. What does the OBDII code P2156 mean for a 2014 Chevrolet Silverado?

P2156 indicates a problem with the Cylinder 4 Injector High Control Circuit, specifically low voltage being detected by the Engine Control Module (ECM).

2. What are the common symptoms of P2156 on a 2014 Chevrolet Silverado?

Common symptoms include rough idling, engine misfires, reduced engine performance, poor fuel economy, and possibly the check engine light being illuminated.

3. What causes the P2156 code to appear?

The code can be triggered by a faulty fuel injector, damaged or corroded wiring, a bad injector driver in the ECM, or a poor electrical connection in the injector circuit.

4. How do I diagnose the P2156 code?

Start by inspecting the wiring and connectors for Cylinder 4's injector for damage or corrosion. Use a multimeter to check for proper voltage and continuity in the circuit. Test the injector itself and the ECM if necessary.

5. Can I drive my 2014 Chevrolet Silverado with the P2156 code?

Driving with this code is not recommended, as it can lead to reduced engine performance, potential damage to the catalytic converter, and further engine issues if left unaddressed.

6. How is the P2156 code typically fixed?

Repairs may include replacing the faulty injector, repairing or replacing damaged wiring, cleaning corroded terminals, or in rare cases, replacing the ECM.

7. How much does it cost to fix the P2156 code on a 2014 Chevrolet Silverado?

The cost can vary. Replacing a fuel injector typically costs $200-$500, while wiring repairs or ECM replacement might increase the expense depending on labor rates and parts availability.

8. Can a bad ECM cause the P2156 code?

Yes, a malfunctioning ECM or injector driver circuit in the ECM can cause the code by failing to properly control the injectorâ€™s voltage.

9. What tools are needed to troubleshoot the P2156 code?

Youâ€™ll need an OBDII scanner, a multimeter for electrical testing, and potentially wiring diagrams for the injector circuit to identify and resolve the issue.

10. Is the P2156 code a common issue on the 2014 Chevrolet Silverado?

While not extremely common, injector circuit issues like P2156 can occur, especially as the vehicle ages or if there has been exposure to harsh conditions affecting wiring or components.