olegf

ES300, 98, 87K. "Check engine" light is on. I checked the gas tank cap, it's tight. Car runs good. My mechanic read error code - PO135 "HO2S Heater Circut Malfunction, Bank 1 Sensor 1". It's $160 sensor + labor. I wander if readings on non-Lexus equipment can be trusted, or I need to go to Lexus dealer for diagnostics? Thanks.

Seems as problem fixed after my mechanic cleaned throttle body and injector. It's already 3 weeks I do not have problem starting the car. Thank you all for your advise. Now it's a new problem :-( "Check engine" light is on. I checked the gas tank cap, it's tight. My mechanic read error code - PO135 "HO2S Heater Circut Malfunction, Bank 1 Sensor 1". It's $160 sensor + labor. I wander if readings on non-Lexus equipment can be trusted or I need to go to Lexus dealer for diagnostics?

Thank you very much for quick replies. I own this car for 3 month and it has 85,000 miles on it. Service record indicates air filter was cleaned 7 month ago. Battery is new, and car does not have other (visible) problems. Cold startup problem occurred 3 times. Answering question from skperformance: “if you press the gas does it keep the engine from dieing?” - Yes, If I press gas, it keeps engine from dieing. I’ll make sure to go through all the checks posted by steviej .

Our Lexus ES300/98 has intermittent idle problem. Once in a while engine stales immediately after it starts. It take 5-6 tries to fully start the car. Any suggestion is greatly appreciated.