P0185 Fault Code

Fuel Temperature Sensor B Circuit Malfunction

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

The P0185 fault code indicates a malfunction in the Fuel Temperature Sensor B circuit. This sensor plays a crucial role in monitoring the temperature of the fuel, which is essential for optimal engine performance and emissions control. When the system detects a voltage or resistance issue with the sensor, it triggers this trouble code.

Key Points:

• The ECU relies on accurate fuel temperature readings.
• Issues can arise from the sensor itself, wiring, or connectors.
• This fault code is often associated with other fuel system related codes.

What are the symptoms of the P0185 code?

When the P0185 code is present, drivers may experience a variety of symptoms such as:

• Check Engine Light illuminated
• Poor fuel efficiency
• Engine performance issues, including hesitation or stalling
• Difficulty in starting the vehicle
• Potential increase in emissions.

What causes the P0185 code?

There are several potential causes for the P0185 fault code.

• A faulty Fuel Temperature Sensor B
• Short or open circuit in the wiring
• Corroded or damaged connectors
• Issues with the Engine Control Unit (ECU)
• Improper fuel temperature readings affecting fuel delivery.

How to fix P0185?

To address the P0185 fault code, technicians typically follow these steps:

• Use an OBD-II scanner to confirm the code and check for related codes.
• Inspect the wiring and connectors for damage or corrosion.
• Test the Fuel Temperature Sensor B for proper function using a multimeter.
• Replace the sensor if found defective.
• Clear the fault code from the ECU and conduct a road test to ensure the issue is resolved.