P1538: Intake Manifold Runner Control (Bank 2) Stuck Open

What does P1538 mean?

P1538 is a diagnostic trouble code indicating "Intake Manifold Runner Control (Bank 2) Stuck Open". This code relates to your vehicle's intake system and should be diagnosed to determine the root cause. The severity level helps indicate how urgently this should be addressed.

Symptoms you may notice

• Check engine light (MIL) illuminated on dashboard
• Noticeable change in engine performance
• Unusual sounds or vibrations
• Possible issues with intake system operation
• Vehicle may enter reduced power mode (limp mode)

Common causes

• Faulty intake system component
• Wiring or connector issue in the related circuit
• Failed sensor providing incorrect readings
• Software/calibration issue requiring ECU update
• Related component causing secondary fault

What should you do?

This is a significant issue that should be diagnosed and repaired soon. Avoid long trips or heavy driving until the problem is resolved. Continued driving may cause additional damage.