P2687 Fault Code

Fuel Supply Heater Control Circuit/Open

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2687 code indicates an issue with the Fuel Supply Heater Control Circuit, specifically that it is open. This can prevent the fuel supply heater from functioning properly, which plays a critical role in maintaining optimal fuel temperature and ensuring proper engine operation in colder conditions.

What are the symptoms of the P2687 code?

Symptoms associated with the P2687 code may involve:

• Difficulty starting the engine, especially in cold weather.
• Decreased engine performance or stalling when cold.
• Increased fuel consumption due to improper fuel heating.
• Warning lights illuminated on the dashboard, often including the Check Engine Light.

What causes the P2687 code?

Common causes of the P2687 code include:

• Faulty fuel supply heater.
• Open or damaged wiring in the fuel supply heater circuit.
• A broken or malfunctioning relay that controls the circuit.
• Poor electrical connections or corrosion in the wiring harness.
• Issues with the Engine Control Module (ECM) failing to send the correct signals.

How to fix P2687?

To resolve the P2687 code, the following steps are recommended:

• Inspect the wiring and connectors of the fuel supply heater circuit for any damage or corrosion.
• Test the fuel supply heater for proper operation and replace it if faulty.
• Check the relay for the circuit and replace if it is not functioning.
• Ensure that the ECM is generating the correct signals and replace if necessary.
• Clear the code and perform a road test to ensure that the problem has been resolved.