2025 Toyota Grand Highlander: check engine light

Filed Sep 21, 2026 · Engine · 15,000 miles · WI

The contact owned a 2025 Toyota Grand Highlander. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed with radiator failure. The contact was informed that there was a hole in the radiator. The contact was informed that the radiator needed to be replaced. The vehicle was repaired. The manufacturer was contacted by phone and made aware of the failure. The failure mileage was approximately 15,000.

Filed Aug 22, 2026 · IL

My wife was driving and a small rock passed through the front grill puncturing the radiator and causing her check engine light to come on. Within 5 minutes the coolant leaked out and the car was undrivable. We took it to Bredemann Toyota in Park Ridge who replaced it.

Filed Jan 9, 2026 · Brakes · NC

2025 Toyota Grand Highlander Hybrid AWD, with about 16000 miles. While driving, the brakes failed. The brakes would only work if the pedal was pushed all the way to the floor. A "Low Brake Power" warning light came on the dash. The following warnings came on at the same time. Parking Brake System, Advanced Ultrasonic Detection, Vehicle Stability Control, Check Engine, Smart Stop System, Brake System, Electronically controlled Brake, Secondary Collision Brake, Anti-lock Brake System. I was lucky to have been traveling on a road that was not busy and was traveling at less than 30 mph very close to my home. Had I been driving on the interstate, on a busy road, or near pedestrians, the event could have injured or killed myself, my family, or others. The car was towed into the dealership. The dealership said that the issue was not current and the car operated normally when after it was towed in. The following DTC codes where present (P05E000, P05E062). This indicates an issue in wiring or brake pedal stroke sensor. They suspect its an intermittent issue with the sensor. The sensor was replaced (P/N, 89510-0R010 and 62112-0E040-C1). They also said the car battery was low and replaced it (P/N 00544-H5061-540). The dealership said that they would send the affected part to Toyota for inspection, but I have not heard anything back. The dealership experience was poor (Mark Jacobson Toyota, Durham, NC).

Filed Jul 14, 2025 · Engine · CA

The vehicle suddenly gave several warnings of “check engine visit your dealer”, “Hybrid system malfunction”, “AWD system malfunction 2WD activated” and “System malfunction visit your dealer.” The vehicle was bought new 4 weeks prior. Took it to the dealership and the technician said there was coolant all over the engine compartment and there was a leak somewhere. After inspection he told us that a small rock hit the radiator and caused damage. Told to replace the radiator and flush the system and it was not covered under warranty. After research was done, it was found there was a forum with hundreds of not thousands of people with the same issue. This has been an issue with the new OEM front grill not protecting the radiator and leaving it susceptible to be damaged easily. Toyota Corporate was called and said they were aware of the issue for some time. Even the Technician told us this is a common issue with this vehicle. Also if you place something inside the grill to protect the radiator, it will void the warranty.

Filed Jul 11, 2025 · Engine, Fuel system · WA

The vehicle was in PARK and the IGN was in the ON/RUN position and the air conditioning was on. There was no one in the driver's seat but there was an occupant sitting buckled in the front passenger seat. The passenger heard a sound (possibly the ICE turning on) and he felt the vehicle move forward about five inches. He became worried about his safety and pressed the IGN button in order to turn the vehicle off. It could have pushed itself into other cars in the parking lot or pedestrians. A report was made to the local police department on the same day. This occurred in a retail parking lot. Video footage cannot be obtained as a police officer or insurance company must request it. I have not seen a check engine light nor any message prompts and it has not been inspected by a dealership.