AutoCodes – Isuzu – P1249 Isuzu

P1249 Isuzu Code - Low Fuel Pressure Sensor Circuit High Voltage

Quick Answer

The Engine Control Module (ECM) monitors the Low Fuel Pressure Sensor. Common causes include Faulty Low Fuel Pressure Sensor (FPS), Low Fuel Pressure Sensor harness is open or shorted, Low Fuel Pressure Sensor 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: P1249 Isuzu indicates Low Fuel Pressure Sensor Circuit High Voltage.
Common causes: Common causes include Faulty Low Fuel Pressure Sensor (FPS), Low Fuel Pressure Sensor harness is open or shorted, Low Fuel Pressure Sensor 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 6,494

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 Aug 12, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1249 Isuzu Description

The Engine Control Module (ECM) monitors the Low Fuel Pressure Sensor. The ECM sets the Diagnostic Trouble Code (DTC) when the Low Fuel Pressure Sensor is not to factory specifications.

OBDII Code P1249 Isuzu - Low Fuel Pressure Sensor Circuit High Voltage - AutoCodes.com — P1249 Isuzu Code - Low Fuel Pressure Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1249 Isuzu?

Faulty Low Fuel Pressure Sensor (FPS)
Low Fuel Pressure Sensor harness is open or shorted
Low Fuel Pressure Sensor circuit poor electrical connection

How to Fix the DTC P1249 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 P1249 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 P1249 Isuzu code?

Need more information on how to fix the P1249 Isuzu code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1249 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 P1249 Isuzu Code

1. What are the common symptoms of OBDII code P1249 (Isuzu) indicating Low Fuel Pressure Sensor Circuit High Voltage?

The common symptoms include hard starting, rough idling, poor acceleration, and possible stalling of the engine.

2. What are the possible causes of OBDII code P1249 (Isuzu)?

Possible causes can include a faulty fuel pressure sensor, issues with the fuel pump, clogged fuel filter, wiring problems, or a problem with the engine control module.

3. How can I diagnose the cause of OBDII code P1249 (Isuzu)?

Diagnosis typically involves checking the fuel pressure sensor, inspecting the fuel pump and filter, testing the wiring for continuity and shorts, and scanning the vehicle's computer for any related fault codes.

4. What are the repair options for OBDII code P1249 (Isuzu)?

Repair options may include replacing the fuel pressure sensor, addressing fuel pump or filter issues, repairing wiring faults, or reprogramming the engine control module.

5. Can I drive my vehicle with OBDII code P1249 (Isuzu) present?

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.

6. How urgent is the repair for OBDII code P1249 (Isuzu)?

It is advisable to address this issue promptly to prevent any potential damage to the engine or fuel system components.

7. Can a DIY enthusiast fix OBDII code P1249 (Isuzu)?

Depending on your level of automotive knowledge and experience, some repairs related to this code can be done DIY, but complex issues may require professional assistance.

8. How much does it cost to repair OBDII code P1249 (Isuzu)?

The cost of repair can vary depending on the specific cause of the issue, parts needed, and labor rates, so it's best to get a diagnosis from a mechanic for an accurate estimate.

9. Will resetting the OBDII code P1249 (Isuzu) make it go away permanently?

Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear.

10. How can I prevent OBDII code P1249 (Isuzu) in the future?

Regular maintenance, such as changing the fuel filter as recommended, monitoring fuel system health, and addressing any issues promptly, can help prevent this code from recurring.