AutoCodes – Lexus – P1235 Lexus

P1235 Lexus Code - High Pressure Fuel Pump Circuit

Quick Answer

P1235 Lexus indicates High Pressure Fuel Pump Circuit. Common causes include Faulty High Pressure Fuel Pump, High Pressure Fuel Pump harness is open or shorted, High Pressure 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: P1235 Lexus indicates High Pressure Fuel Pump Circuit.
Common causes: Common causes include Faulty High Pressure Fuel Pump, High Pressure Fuel Pump harness is open or shorted, High Pressure 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 20,974

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 Jul 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1235 Lexus Description

OBDII Code P1235 Lexus - High Pressure Fuel Pump Circuit - AutoCodes.com — P1235 Lexus Code - High Pressure Fuel Pump Circuit

What does this mean?

What are the Possible Causes of the DTC P1235 Lexus?

Faulty High Pressure Fuel Pump
High Pressure Fuel Pump harness is open or shorted
High Pressure Fuel Pump circuit poor electrical connection

How to Fix the DTC P1235 Lexus?

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 P1235 Lexus 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 P1235 Lexus code?

Need more information on how to fix the P1235 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1235 Lexus 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 P1235 Lexus Code

1. What are common symptoms of OBDII code P1235 in a Lexus related to the high-pressure fuel pump circuit?

Symptoms may include engine stalling, rough idling, difficulty starting the engine, and a noticeable decrease in vehicle performance.

2. What are potential causes of OBDII code P1235 in a Lexus indicating issues with the high-pressure fuel pump circuit?

Possible causes include a faulty high-pressure fuel pump, damaged fuel pump wiring, poor electrical connections, or a problem with the fuel pump control module.

3. How can I diagnose the high-pressure fuel pump circuit issue causing OBDII code P1235 in my Lexus?

Diagnosis typically involves checking the fuel pump's electrical connections, inspecting the wiring for any damage, testing the fuel pump's operation, and scanning for any additional fault codes.

4. Can I still drive my Lexus with OBDII code P1235 related to the high-pressure fuel pump circuit?

It is not recommended to continue driving your Lexus with this code, as it can lead to further engine damage and potential safety hazards. It's best to address the issue promptly.

5. What are some repair tips for fixing OBDII code P1235 in a Lexus due to problems with the high-pressure fuel pump circuit?

Repair tips may include replacing the high-pressure fuel pump, repairing or replacing damaged wiring, ensuring proper electrical connections, and resetting the fault code after repairs are completed.

6. Is it possible to reset OBDII code P1235 in a Lexus related to the high-pressure fuel pump circuit without fixing the underlying issue?

Resetting the code without addressing the root cause may temporarily turn off the check engine light, but the issue will likely resurface, and potential engine damage can occur. It's best to fix the problem first.

7. Are there any preventive maintenance measures to avoid OBDII code P1235 in a Lexus linked to the high-pressure fuel pump circuit?

Regularly inspecting the fuel pump and its components, ensuring proper fuel system maintenance, and addressing any unusual engine behavior promptly can help prevent this issue.

8. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P1235 in a Lexus attributed to the high-pressure fuel pump circuit?

While some simple tasks like checking electrical connections can be done by DIY enthusiasts, diagnosing and repairing the high-pressure fuel pump circuit issue may require advanced tools and expertise best handled by a professional mechanic.

9. How long does it typically take to repair OBDII code P1235 in a Lexus due to a malfunctioning high-pressure fuel pump circuit?

The repair time can vary based on the exact cause of the issue, the availability of parts, and the mechanic's expertise. It may take a few hours to a day to complete the repair.

10. Can a malfunctioning high-pressure fuel pump circuit causing OBDII code P1235 impact the fuel efficiency of a Lexus?

Yes, a faulty high-pressure fuel pump circuit can affect fuel delivery to the engine, leading to decreased fuel efficiency and potentially higher fuel consumption. It's essential to address the issue promptly to maintain optimal fuel economy.