Previa Tire Pressure ABS Steering Issues

Interesting symptoms you describe. I drive a Previa myself, and I recall battling something similar not too long ago. The tire pressure warning was the initial indicator, but I didn't experience the ABS or steering issues to the same extent. However, the tire pressure loss was indeed the culprit. Are you absolutely certain that all inflated tires hold pressure?

Certain? Well, I visually inspected the tires and didn't spot any obvious punctures. I also checked the pressure manually, and it seemed within the normal range, albeit perhaps a tad low in one tire. Could a faulty tire sensor be triggering all of this, even if the pressure is only marginally off? Is that tire sensor also responsible for the ABS and power steering issues?

A faulty tire sensor is certainly a possibility, but in my case, the pressure loss, even a slight one, was enough to trigger the warning system and, potentially, interact with the ABS system due to the changes in wheel speed. Given the other symptoms you are experiencing, I strongly recommend a thorough diagnostic check at a reputable workshop. Have them check the tire pressure, tire monitoring system and look for anything related to the power steering failure.

Thank you for the insight. I appreciate you confirming a similar experience. I've taken your advice and visited a workshop. Turns out the valve in one tire was indeed defective, causing a slow leak and triggering the pressure warning and subsequent issues. The repair cost came to 280€. All sorted now.