Highlander Hybrid check engine light air valve hose

The check engine light suggests a potential issue with the air supply system. Any other symptoms, like unusual noises or changes in engine performance? Vacuum hoses or the air intake system may be involved.

No other symptoms really, just the light. Any specific hoses I should be checking first, or is it best to just replace them all?

Given the absence of other symptoms, inspect the hose connections from the pump to the valve, as you suspected. Without diagnostic equipment, pinpointing the exact defect can be challenging. Consulting a qualified technician may be beneficial.

Thanks, took it to the shop as you suggested. Turns out it was indeed a cracked hose to the air valve. Replaced it for 175€. All good now.