AutoCodes – GMC – P0233 GMC

P0233 GMC Code - Fuel Pump Secondary Circuit Intermittent

Quick Answer

The Engine Control Module (ECM) supplies voltage to the Fuel Pump Flow Control Module (FPCM) when the ECM detects that the ignition is on. Common causes include Blown Fuel Pump fuse, Open Fuel Pump Monitor Circuit, Faulty Fuel Pump Relay. 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: P0233 GMC indicates Fuel Pump Secondary Circuit Intermittent.
Common causes: Common causes include Blown Fuel Pump fuse, Open Fuel Pump Monitor Circuit, Faulty Fuel Pump Relay.
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 1,844

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 Apr 13, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0233 GMC Description

The Engine Control Module (ECM) supplies voltage to the Fuel Pump Flow Control Module (FPCM) when the ECM detects that the ignition is on. The voltage from the ECM to the FPCM remains active for 2 seconds, unless the engine is in crank or run. While this voltage is being received, the FPCM supplies a varying voltage to the fuel tank pump module in order to maintain the desired fuel rail pressure.

OBDII Code P0233 GMC - Fuel Pump Secondary Circuit Intermittent - AutoCodes.com — P0233 GMC Code - Fuel Pump Secondary Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P0233 GMC?

Blown Fuel Pump fuse
Open Fuel Pump Monitor Circuit
Faulty Fuel Pump Relay
Damaged Engine Control Module (ECM)

How to Fix the DTC P0233 GMC?

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 P0233 GMC 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 P0233 GMC code?

Need more information on how to fix the P0233 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0233 GMC code diagnosed by a professional: Find a repair shop in your area

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 P0233 GMC Code

1. What are the common symptoms of OBDII code P0233 GMC (Fuel Pump Secondary Circuit Intermittent)?

- Common symptoms include stalling or hesitation during acceleration, engine misfires, decreased fuel efficiency, and difficulty starting the vehicle.

2. What can cause the OBDII code P0233 GMC to trigger?

- The code can be triggered by issues such as a faulty fuel pump relay, damaged wiring or connectors in the fuel pump circuit, or a failing fuel pump itself.

3. How can I diagnose the cause of OBDII code P0233 GMC?

- Diagnosing the issue may involve testing the fuel pump relay, inspecting the wiring and connectors in the fuel pump circuit, and checking the fuel pump's functionality using a multimeter.

4. What are the potential repair options for OBDII code P0233 GMC?

- Repair options may include replacing the fuel pump relay, repairing or replacing damaged wiring or connectors, and ultimately replacing the fuel pump if it is deemed faulty.

5. Can a clogged fuel filter cause OBDII code P0233 GMC to appear?

- While a clogged fuel filter can contribute to fuel delivery issues, it is not a direct cause of P0233. However, a clogged filter can strain the fuel pump and potentially lead to its failure.

6. How urgent is it to address OBDII code P0233 GMC once it appears?

- It is important to address the issue promptly to prevent potential stalling or other drivability issues that can arise from fuel pump circuit problems.

7. Can I drive my vehicle with OBDII code P0233 GMC present?

- It is not recommended to drive your vehicle with a P0233 code present, as it can lead to unreliable fuel delivery and potentially cause further damage to the fuel system.

8. Are there any preventive maintenance steps to avoid OBDII code P0233 GMC in the future?

- Regularly inspecting and replacing the fuel filter as recommended by the manufacturer can help prevent strain on the fuel pump and reduce the likelihood of encountering P0233.

9. Can extreme weather conditions affect the fuel pump circuit and trigger OBDII code P0233 GMC?

- Yes, extreme weather conditions, particularly temperature fluctuations, can affect the performance of the fuel pump circuit components and increase the risk of intermittent issues leading to P0233.

10. How long does it typically take to repair OBDII code P0233 GMC?

- The repair time can vary depending on the exact cause of the issue and the complexity of accessing and replacing the faulty components, but it may take a few hours to a full day to complete the repair.