P2027 Fault Code

Evaporative Emissions (EVAP) Fuel Vapor Temperature Sensor Circuit High Voltage

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

The P2027 fault code indicates a high voltage condition detected in the Evaporative Emissions (EVAP) Fuel Vapor Temperature Sensor Circuit. This sensor plays a crucial role in monitoring the temperature of fuel vapors in the EVAP system, which prevents harmful fuel vapors from escaping into the atmosphere. When the sensor circuit experiences high voltage, it may lead to inaccurate readings and trigger the check engine light.

What are the symptoms of the P2027 code?

Common symptoms associated with the P2027 code include:

• Illuminated check engine light.
• Poor engine performance or rough idling.
• Decreased fuel efficiency due to improper EVAP functioning.
• Evaporative emission system-related issues, potentially leading to failed emissions tests.

What causes the P2027 code?

Several issues can lead to a P2027 fault code, including:

• A faulty fuel vapor temperature sensor that sends incorrect voltage signals.
• Damaged wiring or connectors in the EVAP system that can cause short circuits.
• High resistance in the sensor circuit due to corrosion or poor connections.
• A malfunctioning Engine Control Module (ECM) that misinterprets the voltage levels.

How to fix P2027?

To resolve a P2027 fault code, the following steps should be taken:

• Use an OBD-II scanner to confirm the fault code and check for any related codes.
• Inspect the fuel vapor temperature sensor and its wiring for any signs of damage, corrosion, or loose connections.
• Test the sensor to ensure it operates within the manufacturer's specifications; replace it if faulty.
• Examine the ECM for any software updates or malfunctions if all other components appear functional.