P0544 Fault Code

Exhaust Gas Temperature Sensor Circuit - Bank 2 Sensor 1

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

The P0544 code is associated with the exhaust gas temperature sensor circuit, specifically for Bank 2 Sensor 1. This sensor is responsible for monitoring the temperature of the exhaust gases in the second bank of the engine. Accurate readings from this sensor help in regulating engine performance and emissions. When the Engine Control Module (ECM) detects a malfunction in this circuit, it triggers the P0544 fault code.

What are the symptoms of the P0544 code?

Common symptoms associated with the P0544 code include:

• The Check Engine Light (CEL) illuminating on the dashboard.
• Decreased engine performance or fuel efficiency.
• Increased emissions, which could lead to failing an emissions test.
• In some cases, the engine may go into limp mode to prevent damage.

What causes the P0544 code?

The P0544 code can be triggered by several issues, including:

• A faulty exhaust gas temperature sensor (Bank 2 Sensor 1).
• Damaged wiring or connectors in the sensor circuit.
• Corrosion or poor connections affecting the sensor's performance.
• Short circuits or open circuits in the sensor circuit that disrupt the signal sent to the ECM.
• Issues with the ECM itself, though less common.

How to fix P0544?

To resolve the P0544 code, follow these steps:

• Use an OBD-II scanner to confirm the P0544 fault code.
• Inspect the exhaust gas temperature sensor and its wiring for any visible damage or corrosion. Replace the sensor if faulty.
• Test the sensor's resistance with a multimeter to ensure it operates within the manufacturer's specifications.
• Repair or replace any damaged wiring or connectors in the circuit.
• Clear the fault codes and perform a test drive to see if the code returns.