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 1997 Toyota Previa
1997 Toyota Previa
1997 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.
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.
The Throttle Position Sensor can get out of adjustment due to wear in the throttle body or due to carbon build up. This will cause the idle timing to advance more than 30 degrees which will cause very high HC and NOx emissions. Conversely, the Throttle Position Sensors can wear out and not properly advance the timing which causes a lack of power and poor fuel economy.
1997 Toyota Previa Recalls (Recent)
Summary: DUE TO A CLEARANCE BETWEEN THE OIL SEPARATOR PLATE AND THE DIFFERENTIAL HOUSING OF THE FRONT DIFFERENTIAL UNIT, OIL LEAKAGE AT THE AIR BREATHER PLUG CAN OCCUR, WHEN THE VEHICLE IS OPERATED CONTINUOUSLY ABOVE 75 MILES PER HOUR.Learn more »
1997 Toyota Previa Questions and Answers
I need to replace my right side reverse light
how do you replace a reverse light bulb
coolant level is good no visal leaks of coolant,make a boiling sound when i shut it off when it is running hot