What is an OBD2 code?

An OBD2 (On-Board Diagnostics) code is a diagnostic trouble code (DTC) generated by your vehicle's computer system when it detects a problem. These codes help identify specific issues with your vehicle's engine, transmission, emissions, or other systems.

How do I read OBD2 codes?

To read OBD2 codes, you'll need an OBD2 scanner. Plug it into your vehicle's OBD2 port (usually located under the dashboard), turn your key to the 'ON' position, and follow your scanner's instructions to retrieve the codes. Each code starts with a letter (P, B, C, or U) followed by four numbers.

What do the different types of OBD2 codes mean?

OBD2 codes are categorized by their first letter: P (Powertrain) for engine and transmission issues, B (Body) for interior systems like airbags, C (Chassis) for mechanical systems like brakes, and U (Network) for computer and module communication problems.

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Home » OBD2 Codes » P1407

Code P1407

Symptoms

• Inaccurate fuel gauge reading

• Check engine light illuminated

• Erratic fuel level display

Common Causes

• Faulty fuel level sensor

• Damaged wiring or connectors

• PCM malfunction

Glossary

PCM: Powertrain Control Module

OBD-II: On-Board Diagnostics II

Related Codes

• P0460

• P0461

Official description

Fuel Level Signal 1

Laymans terms

This code means that the car's computer is having trouble reading how much gas is in the tank. It's like when your video game controller can't tell how many lives you have left.

Explanation

The P1407 code indicates a problem with the signal from the fuel level sensor to the vehicle's powertrain control module (PCM).

Technical description

The fuel level sensor sends a signal to the PCM to indicate the amount of fuel in the tank. A P1407 code is set when the PCM detects an unexpected signal from the fuel level sensor, which may be due to an incorrect reading or a malfunction.

Diagnosis steps

• Check for other codes related to the fuel system.

• Inspect the fuel level sensor and its wiring for damage.

• Test the fuel level sensor output with a multimeter.

Repair procedures

• Replace the fuel level sensor if faulty.

• Repair or replace damaged wiring or connectors.

• Reprogram or replace the PCM if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Wrench set

Estimated repair cost

$150 - $400

Difficulty level

Moderate

Commonly affected vehicles

• Ford Focus

• Chevrolet Malibu

• Toyota Camry

Preventive measures

• Regularly check fuel level sensor connections.

• Avoid running the vehicle on low fuel frequently.

• Schedule routine maintenance checks.

Error code type

Sensor Issue

User experience recommendations

• Keep track of fuel fill-ups manually until fixed.

• Avoid long trips until the issue is resolved.

Warranty information

Check with the vehicle manufacturer for warranty coverage on fuel system components.

Historical data

This code has been reported more frequently in vehicles with high mileage or those operating in harsh conditions.

Urgency level

Moderate – While the vehicle may still operate, inaccurate fuel readings can lead to unexpected stalls.

Legal and safety notice

Ignoring this issue may lead to running out of fuel unexpectedly, which can be dangerous.

Testing conditions

• Vehicle at operating temperature

• Fuel level sensor connected

Component location

The fuel level sensor is typically located inside the fuel tank, attached to the fuel pump module.

FAQs

Q: Can I drive with a P1407 code?
A: Yes, but be cautious as the fuel gauge may not be accurate.

Q: How do I reset the P1407 code?
A: Fix the underlying issue, then use an OBD-II scanner to clear the code.

Last updated: Apr 16, 2026 • Source: internal database

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