P2608 Fault Code

Intake Air Heater B Circuit High

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

The P2608 fault code indicates a problem with the Intake Air Heater B Circuit, specifically that it is operating at a high voltage level. This could mean that the circuit is receiving too much current, which can lead to performance issues and potential damage to the intake air heater system. Understanding this code is crucial for diagnosing issues related to cold starting and engine performance.

What are the symptoms of the P2608 code?

Vehicles with the P2608 code typically exhibit several symptoms, such as:

• Difficulty starting the engine, especially in cold weather conditions.
• Reduced engine performance or reduced fuel economy.
• Illuminated Check Engine Light on the dashboard.
• The engine may run rough or stall shortly after starting.

What causes the P2608 code?

Several factors can lead to the P2608 fault code, including:

• A faulty intake air heater element that is shorted to power.
• Damaged wires or connectors in the intake air heater circuit which may be causing a short.
• A malfunctioning Engine Control Unit (ECU) that misinterprets data from the sensor.
• Faulty temperature sensors that incorrectly measure the intake air temperature.

How to fix P2608?

To resolve the P2608 fault code, the following steps are recommended:

• Inspect the intake air heater circuit for damaged wires or loose connections.
• Test the intake air heater element for proper operation and replace if necessary.
• Check the ECU for any faults or updates that could address the underlying issue.
• Clear the fault code and perform a road test to ensure the problem is resolved.