Toyota Previa Repair and Maintenance
A guide to problems, costs, maintenance and repair for your Toyota Previa
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Toyota Previa ProblemsFailed Emissions Test Due to Blocked EGR System
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 also wise to verify the EGR system components i.e. the Transducer, EGR Valve and VSV Solenoid at this time.
Occasionally, the mass air flow sensor can go lean and set a code P0170 for fuel system lean. This in not an oxygen sensor problem. If there are no vacuum leaks, the mass air flow sensor may need to be replaced. Our technicians remind us to use a factory part because the aftermarket rebuilds are very inconsistent.
A loss of power on the freeway may due to an internally leaking fuel pulsation dampener. This commonly occurs on higher mileage vehicles.
Toyota Previa QuestionsCat converter compatibility (1 answer)
Replacing a cat converter on this van! The Aftermarket item I am looking at says OBDII compatible...will this cat converter still work with the Old OBDI diag SYSTEM?? The O2 sensors are the interface with the OBDI diag SYSTEM sooo it shouldn't make any difference to the Actual Hardware...same...
Toyota Previa RecallsRecall 97V056000
Toyota is recalling 1991 Camry and Previa models because the failure of a specific electronic component in the radio may cause an electrical short circuit. If this happens, it may result in a passenger compartment fire. Dealers will repair the radio.