P240C Fault Code

Evaporative Emission System Leak Detection Pump Heater Control Circuit High

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

The P240C fault code indicates an issue with the Evaporative Emission System Leak Detection Pump Heater Control Circuit. This system is crucial in reducing harmful emissions from the vehicle's fuel system and ensuring the proper functionality of the evaporative emission control system (EVAP).

• The leak detection pump is responsible for creating pressure in the EVAP system to detect any leaks.
• The heater control circuit helps maintain an optimal operating temperature for the pump, ensuring it functions correctly even under various environmental conditions.
• A malfunction in this circuit may lead to various system failures, contributing to increased emissions and a potential Check Engine Light (CEL).

What are the symptoms of the P240C code?

When the P240C code is triggered, you may notice the following symptoms:

• Illuminated Check Engine Light on the dashboard, indicating an error in the system.
• Increased fuel consumption due to inefficient operation of the EVAP system.
• Possible noticeable odors from fuel vapors if there are significant leaks.
• Difficulty in passing emissions tests due to improper functioning of the EVAP system.

What causes the P240C code?

There are several potential causes for a P240C fault code:

• Faulty or damaged leak detection pump.
• Issues with the pump's wiring, such as frayed or shorted wires.
• Malfunctioning heater control circuit or relay.
• A blown fuse in the circuit.
• Poor electrical connections or corroded terminals.
• Failure of the engine control module (ECM) to send or receive signals properly.

How to fix P240C?

To resolve the P240C fault code, an inspection and replacement of faulty components may be necessary:

• Start by checking the leak detection pump for any signs of physical damage.
• Inspect the wiring and connectors for issues, and repair or replace them as needed.
• Test the heater control circuit and replace the relay or fuse if found faulty.
• Clear the fault codes after repairs and run the vehicle to ensure the issue has been resolved.
• Consider performing a smoke test to detect any leaks in the EVAP system, followed by repairs as needed.