What is the reason for the malfunction indicator light and side slip indicator light on the 09 Highlander?
3 Answers
When the malfunction indicator light and side slip indicator light on the 09 Highlander are illuminated, it indicates that there is an engine malfunction that requires repair. Related information: 1. Introduction: The Toyota Highlander features a spacious body with innovative and roomy interior space. It is a large-sized SUV in the Toyota family, and the Highlander comes standard with the highest level of safety equipment in its class. This SUV offers a very quiet ride and exceptional responsiveness, combining versatility with driving comfort. 2. Expansion: The Highlander is equipped with comprehensive safety features. It has a total of seven airbags, which is the highest configuration level in its class, including a driver's knee airbag and side curtain airbags for all three rows of seats.
I've been driving this 2009 Highlander for several years, and one time both the malfunction indicator light and the skid control light came on simultaneously, which really gave me a scare. Later at the repair shop, they checked the trouble codes and found it was an issue with the wheel speed sensor. This sensor monitors wheel rotation speed, and when it gets dirty or damaged, it can affect the brake system and engine control. Other possible causes include excessive carbon buildup in the throttle body or insufficient brake fluid - these minor issues can easily trigger warning lights. In my case, cleaning the sensor solved the problem. I'd suggest owners not panic when encountering this situation - first use an OBD tool to read the trouble codes. Unstable battery voltage could also trigger these lights. During normal driving, try to avoid excessive vibration to the sensors from rough road surfaces.
As a seasoned car enthusiast, it's common to see the malfunction indicator light and the skid light illuminate simultaneously in the Highlander 09 owner groups. The primary causes are faulty wheel speed sensors or loose ABS system sensor connections. Aging sensors or damaged wiring can cause signal confusion, making the vehicle think the wheels are slipping or the engine is malfunctioning, thus triggering both lights. It could also be due to a problematic throttle position sensor or low brake fluid level causing interference. For DIY attempts: first, check if the battery terminals are tight, then use sandpaper to clean the wheel speed sensor contact points. A simple try might turn off the lights, but if they remain lit, don't push your luck—seek a professional technician immediately to avoid risks.
