AutoCodes – Suzuki – P0628 Suzuki

P0628 Suzuki Code - Fuel Pump Relay Control Circuit Low

Quick Answer

The Engine Control Module (ECM) monitors the Fuel Pump Control Circuit. Common causes include Faulty fuel pump relay, Faulty fuel pump, Fuel pump harness is open or shorted. 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: P0628 Suzuki indicates Fuel Pump Relay Control Circuit Low.
Common causes: Common causes include Faulty fuel pump relay, Faulty fuel pump, Fuel pump harness is open or shorted.
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 5,017

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 May 01, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0628 Suzuki Description

The Engine Control Module (ECM) monitors the Fuel Pump Control Circuit. The ECM sets the OBDII code when the Fuel Pump Control Circuit is out of factory specifications.

OBDII Code P0628 Suzuki - Fuel Pump Relay Control Circuit Low - AutoCodes.com — P0628 Suzuki Code - Fuel Pump Relay Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0628 Suzuki?

Faulty fuel pump relay
Faulty fuel pump
Fuel pump harness is open or shorted
Fuel pump circuit poor electrical connection
Faulty fuel pump control module (if applicable)

How to Fix the DTC P0628 Suzuki?

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 P0628 Suzuki 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 P0628 Suzuki code?

Need more information on how to fix the P0628 Suzuki code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0628 Suzuki 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 P0628 Suzuki Code

1. What does the OBDII code P0628 mean on a Suzuki?

P0628 indicates a low voltage or malfunction in the fuel pump relay control circuit, which can affect the fuel pump's ability to operate properly.

2. What are the common symptoms of code P0628 in a Suzuki?

Symptoms include difficulty starting the engine, engine stalling, reduced engine performance, or a no-start condition.

3. What causes the P0628 code to appear?

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

4. Can a bad fuel pump relay cause the P0628 code?

Yes, a defective fuel pump relay can prevent proper voltage from reaching the fuel pump, triggering the P0628 code.

5. How do I diagnose the P0628 code on a Suzuki?

Start by inspecting the fuel pump relay, wiring, and connectors for damage or corrosion. Use a multimeter to check for proper voltage in the circuit and test the fuel pump's functionality.

6. Is it safe to drive with the P0628 code on my Suzuki?

Driving with this code can lead to engine stalling or complete failure to start, which may leave you stranded. Itâ€™s best to resolve the issue promptly.

7. Can the P0628 code be caused by a failing fuel pump?

Yes, a failing fuel pump can cause insufficient voltage or resistance in the circuit, triggering the P0628 code.

8. How do I fix the P0628 code on a Suzuki?

Repairs may involve replacing a faulty fuel pump relay, repairing damaged wiring or connectors, replacing the fuel pump, or reprogramming or replacing the ECM if necessary.

9. How much does it cost to fix the P0628 code on a Suzuki?

The cost depends on the cause of the issue. Fuel pump relay replacement typically costs $50â€“$100, while fuel pump replacement or ECM repairs can cost significantly more.

10. Can a weak battery cause the P0628 code?

A weak or failing battery can indirectly contribute to low voltage in the fuel pump control circuit, but it is not the most common cause of this code. Always test the battery and charging system when diagnosing electrical issues.