1998 Toyota Tacoma Q&A
1998 Toyota Tacoma Question: Check engine light ?
What are problems that a check engine light will find - Visitor
Usually on a Tacoma it is a O2 sensor heater circuit or evaporative emission system related. Could be as simple as a loose gas cap but needs to be checked out. If the Check Engine light/Service Engine Soon light illuminates while you are driving, the car's on board computer sees a fault in the engines management system that is causing an excess amount of pollutants to be emitted from your car. This could result in engine damage if left neglected. Some problems that can cause the Check Engine light to stay on may take two "drive cycles' to complete before illuminating the Check Engine Light. The computer sees a problem and looks for an identical set of circumstances to occur to confirm that it has indeed seen a problem before turning on the light. A Check Engine light that continually flashes while you are driving is serious and is a sign that the computer sees a problem that seriously risks damaging the catalytic converter which may result in an expensive repair or even may cause a fire! Diagnostic codes are stored in the vehicle's computer and can be retrieved using a scantool that communicates with the computer in your car. We have in our Repairpal website an encyclopedia with in depth articles about computer, and computer control systems, emission and driveability problems. http://repairpal.com/check-engine-light - patrick mannion
COMPUTER SYSTEM,EMISSION,DRIVABILITY ISSUES.....MECHANIC SAID TO REPLACE OXIGEN SINCERS ? - TROUBLE-MAKER
Occasionally, the Check Engine Light may come on, this can be related to a failed air flow sensor. This type of fault is commonly repaired by cleaning or replacing the air flow sensor.
check engine light came on and i checked all the fluids everything is fine, what could it be?
My check engine light came on and got a code PO125. They say it's the ECT sensor. Is that located at the back of the engine? Is that the cause of the check engine? It seems to run great as is.