AutoCodes – Chevrolet – P0231 2018 Chevrolet Silverado

P0231 2018 Chevrolet Silverado Code - Fuel Pump Control Circuit Low Voltage

Quick Answer

The Engine Control Module (ECM) supplies voltage to the fuel pump driver control module when the ECM detects that the ignition is on. Common causes include Faulty Fuel Pump, Fuel Pump harness is open or shorted, Fuel Pump 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: P0231 2018 Chevrolet Silverado indicates Fuel Pump Control Circuit Low Voltage.
Common causes: Common causes include Faulty Fuel Pump, Fuel Pump harness is open or shorted, Fuel Pump 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 762

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 Jun 02, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0231 2018 Chevrolet Silverado Description

The Engine Control Module (ECM) supplies voltage to the fuel pump driver control module when the ECM detects that the ignition is on. The voltage from the ECM to the fuel pump driver control module remains active for 2 s, unless the engine is in crank or run. While this voltage is being received, the fuel pump driver control module supplies a varying voltage to the fuel tank fuel pump module in order to maintain the desired fuel line pressure. The fuel pump driver control module monitors the fuel pump voltage to determine if the fuel pump is functioning as commanded. The Diagnostic Trouble Code (DTC) will be set if the fuel pump driver control module detects that the fuel pump current is greater than 14.48 A for 1 s.

OBDII Code P0231 2018 Chevrolet Silverado - Fuel Pump Control Circuit Low Voltage - AutoCodes.com — P0231 2018 Chevrolet Silverado Code - Fuel Pump Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0231 2018 Chevrolet Silverado?

Faulty Fuel Pump
Fuel Pump harness is open or shorted
Fuel Pump circuit poor electrical connection
Faulty Fuel Pump Driver Control Module

How to Fix the DTC P0231 2018 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 P0231 2018 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 P0231 2018 Chevrolet Silverado code?

Need more information on how to fix the P0231 2018 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 P0231 2018 Chevrolet Silverado Code

1. What does the OBDII code P0231 mean on a 2018 Chevrolet Silverado?

P0231 indicates a low-voltage condition in the fuel pump control circuit, which may affect the operation of the fuel pump.

2. What are the common symptoms of code P0231 in a 2018 Chevrolet Silverado?

Symptoms include difficulty starting, engine stalling, poor performance, or the engine not starting at all.

3. What causes the P0231 code in a 2018 Chevrolet Silverado?

Common causes include a faulty fuel pump relay, damaged wiring or connectors in the fuel pump circuit, a failing fuel pump, or a malfunctioning powertrain control module (PCM).

4. Can a bad fuel pump cause the P0231 code to appear?

Yes, a failing or faulty fuel pump can cause low voltage in the circuit and trigger the P0231 code.

5. How do you diagnose the P0231 code on a 2018 Chevrolet Silverado?

Diagnosis involves checking the fuel pump relay, inspecting the wiring and connectors for damage or corrosion, and testing the fuel pump for proper operation.

6. Is it safe to drive a 2018 Chevrolet Silverado with a P0231 code?

Driving with this code is not recommended, as it may result in the engine stalling or failing to start, creating a safety risk.

7. How can the P0231 code be fixed in a 2018 Chevrolet Silverado?

Repairs may involve replacing the fuel pump relay, repairing or replacing damaged wiring, or replacing the fuel pump itself.

8. Can a loose or corroded connector trigger the P0231 code?

Yes, a loose or corroded connector in the fuel pump circuit can disrupt the voltage and trigger this code.

9. How much does it typically cost to fix the P0231 code on a 2018 Chevrolet Silverado?

Repair costs vary depending on the cause, but replacing a fuel pump relay or repairing wiring typically costs less than replacing the fuel pump, which can range from $500 to $1000.

10. Can a P0231 code clear itself after repairs?

The code may clear itself after the issue is resolved, but in some cases, the code may need to be manually cleared using an OBDII scanner.