P240B Fault Code

Evaporative Emission System Leak Detection Pump Heater Control Circuit Low

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

The P240B fault code indicates an issue with the evaporative emission system leak detection pump heater control circuit. This system is responsible for detecting leaks in the fuel vapor system, which is essential for maintaining vehicle emissions control. The leak detection pump is heated to ensure proper operation in different environmental conditions.

What are the symptoms of the P240B code?

Common symptoms associated with the P240B code are:

• Check Engine Light illuminated on the dashboard
• Inconsistent fuel economy
• Possible reduction in engine performance
• Failed emissions test due to EVAP system malfunction.
• Increased evaporative emissions.

What causes the P240B code?

Key causes of the P240B code may include:

• Faulty leak detection pump heater
• Open or shorted wiring in the heater control circuit
• Issues with the engine control module (ECM)
• Damaged connectors or poor electrical connections
• Failed evaporative emission system components.

How to fix P240B?

To resolve the P240B fault code, consider the following steps:

• Inspect the leak detection pump heater and wiring for damage or corrosion.
• Test the electrical connections for continuity and voltage.
• Replace any damaged components, such as the leak detection pump or associated wiring.
• Clear the fault codes and perform a thorough system check to ensure proper operability.
• If issues persist, further diagnostics may be needed to check the ECM and other related sensors.