P0700 – OBD-II DTC

OBD-II DTC P0700 – Fuel Level Output Circuit Malfunction

DTC P0700 meaning

DTC P0700 is a generic diagnostic trouble code that indicates a malfunction in the fuel level output circuit. This code is often triggered when the Engine Control Module (ECM) detects an issue with the signal from the fuel level sensor, which is responsible for providing accurate fuel level readings to the vehicle’s computer system. The P0700 code serves as a general indicator that there is a problem, but it does not specify the exact nature of the fault.

DTC P0700 symptoms

Common symptoms associated with DTC P0700 may include:

• Inaccurate fuel gauge readings
• Check Engine Light illuminated
• Possible erratic behavior of the fuel gauge
• Fuel level sensor failure
• Engine performance issues in some cases

DTC P0700 causes

Several factors can lead to the triggering of DTC P0700, including:

• Faulty fuel level sensor
• Wiring issues or damaged connectors in the fuel level circuit
• Corrosion or poor connections in the fuel level sensor circuit
• Faulty Engine Control Module (ECM)
• Software issues within the ECM

DTC P0700 seriousness

The seriousness of DTC P0700 can vary depending on the underlying cause. While it may not immediately affect the drivability of the vehicle, it can lead to:

• Inaccurate fuel level readings, which may result in running out of fuel unexpectedly
• Potential engine performance issues if related to other systems
• Increased difficulty in diagnosing other related issues

It is advisable to address this code promptly to avoid further complications.

How to diagnose DTC P0700

To diagnose DTC P0700, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P0700 code.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the fuel level sensor and its wiring for any visible damage or corrosion.
4. Test the fuel level sensor using a multimeter to ensure it is functioning correctly.
5. Examine the ECM for any software updates or faults.
6. Clear the codes and perform a road test to see if the code reappears.

How to fix DTC P0700 step-by-step instructions

To fix DTC P0700, follow these step-by-step instructions:

1. Confirm the P0700 code with an OBD-II scanner.
2. Inspect the fuel level sensor and wiring for damage or corrosion.
3. If the sensor is faulty, replace it with a new one.
4. Repair any damaged wiring or connectors in the fuel level circuit.
5. Check the ECM for any software updates and apply them if necessary.
6. Clear the trouble codes using the OBD-II scanner.
7. Perform a road test to ensure the issue is resolved and the code does not return.

How to erase DTC P0700

To erase DTC P0700, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Access the trouble codes menu on the scanner.
4. Select the option to clear or erase trouble codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.