The EGR System tends to get restricted or blocked with carbon after 100,000- 125,000 miles which will cause an emissions test failure for NOX. If the EGR system is equipped with an EGR temperature sensor it will trigger a Check Engine Light for improper EGR flow. The repair is to clean out the EGR passages and the EGR Temperature sensor. Our technicians tell this repair is pretty straight forward and takes about 1-1.5 hours. It is al...
Resources for the Repair and Maintenance of your 1994 Toyota Previa
1994 Toyota Previa
1994 Toyota Previa Problems
Over the time the exhaust gas recirculation (EGR) system may become plugged with debris, the oxygen sensor may also be getting slow or 'lazy' around this time. When servicing or cleaning the EGR system, it is a good idea to replace the oxygen sensor because it works in tandem with the EGR system.
At higher mileages, (125,000-150,000) the automatic transmission may not shift correctly. This can be caused by the throttle position sensor being out of adjustment or a shift solenoid needing to be replaced. Typically the transmission does not need to be completely overhauled.
It is important to regularly check the valve clearance as the exhaust valves may become too tight. This will lead to valve failures, which are expensive to repair.
A rough idle and even an emissions inspection failure for high HC and CO can be caused by improperly adjusted valves. Also, exhaust valves may become to tight which can lead to valve failures. Our technicians tell us that regular valve adjustment inspections are a must.
1994 Toyota Previa Questions and Answers
My toyota previa makes a clink noise when put in drive and also makes loud noise when driving any speed over 45 mph.
What could be causing this?
How much will it be to replace auxillary shaft flexible couplings to replace and what are we looking at price wise for u joint trouble?
How to replace the dashboard light?
I need to know where the thermostat is located on a 94 Toyota Previa 4 cylinder and how to change it and how difficult this will be. Thank you
1994 Toyota Previa Reviews
I have had this car for only 3 1/2 yrs. It had high mileage but we knew it would still lsat a little longer. I was in desperate need of a bigger vehicle because my family grew unexpectantly. I absolutely love my van. I have only had minor repairs that were routine maintenance. (tires,oil,lightbulb out) I am at 243,000 miles and its still going strong. Hope it will keep this up for at least another year. Only downfall to this van is it is hard to locate all the parts because of the way the engine is set up. Other than that its perfect.
Great car, over 240,000 miles on it now, and runs almost like new. There are little problems here, and there.