AutoCodes – Isuzu – P1238 Isuzu

P1238 Isuzu Code - High Fuel Pressure Regulator Circuit Shorted To Battery

Quick Answer

P1238 Isuzu indicates High Fuel Pressure Regulator Circuit Shorted To Battery. Common causes include Faulty High Fuel Pressure Regulator, High Fuel Pressure Regulator harness is open or shorted, High Fuel Pressure Regulator 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: P1238 Isuzu indicates High Fuel Pressure Regulator Circuit Shorted To Battery.
Common causes: Common causes include Faulty High Fuel Pressure Regulator, High Fuel Pressure Regulator harness is open or shorted, High Fuel Pressure Regulator 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 3,479

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 Jul 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1238 Isuzu Description

OBDII Code P1238 Isuzu - High Fuel Pressure Regulator Circuit Shorted To Battery - AutoCodes.com — P1238 Isuzu Code - High Fuel Pressure Regulator Circuit Shorted To Battery

What does this mean?

What are the Possible Causes of the DTC P1238 Isuzu?

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

How to Fix the DTC P1238 Isuzu?

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 P1238 Isuzu 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 P1238 Isuzu code?

Need more information on how to fix the P1238 Isuzu code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1238 Isuzu 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 P1238 Isuzu Code

1. What are the common symptoms of OBDII code P1238 in an Isuzu vehicle?

- Common symptoms include rough engine idling, decreased fuel efficiency, lack of power, and potential stalling.

2. What does the OBDII code P1238 "High Fuel Pressure Regulator Circuit Shorted To Battery" mean?

- This code indicates that there is a short circuit between the fuel pressure regulator circuit and the battery in the Isuzu vehicle.

3. What are the possible causes of OBDII code P1238 in an Isuzu?

- Possible causes include damaged wiring, a faulty fuel pressure regulator, a short circuit in the circuit, or a malfunctioning engine control module.

4. How can I diagnose the OBDII code P1238 in my Isuzu?

- Diagnosis usually involves inspecting the wiring for any damage, testing the fuel pressure regulator, checking for shorts in the circuit, and using a diagnostic scanner to retrieve the code.

5. What are the repair options for fixing OBDII code P1238 in an Isuzu?

- Repair options may include repairing or replacing damaged wiring, replacing the fuel pressure regulator, fixing any short circuits, or reprogramming the engine control module.

6. Can I drive my Isuzu with OBDII code P1238?

- It is not recommended to drive the vehicle with this code present, as it can lead to poor engine performance and potential further damage if left unresolved.

7. How urgent is it to address the OBDII code P1238 in an Isuzu?

- It is important to address this code promptly to prevent potential issues with fuel delivery, engine performance, and overall safety of the vehicle.

8. Is it possible to clear the OBDII code P1238 in an Isuzu without fixing the issue?

- Clearing the code without fixing the underlying issue will only temporarily remove the warning light, but the problem will persist and may worsen over time.

9. How much does it typically cost to repair OBDII code P1238 in an Isuzu?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from $200 to $500 or more, including parts and labor.

10. Can a DIY enthusiast fix OBDII code P1238 in an Isuzu?

- While some aspects of diagnosing and repairing this code can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the issue is fully resolved.