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Resources for the Repair and Maintenance of your 1990 Geo Prizm

1990 Geo Prizm

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1990 Geo Prizm Problems

Drive Train -- Verified

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.

Engine -- Verified

The engine mount on the passenger side of the car can wear out on cars with high mileage. This will put extra stress on the other mounts and the faulty mount will need to be replaced.

Exhaust & Emissions -- Verified

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...

Drive Train -- Verified

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You may be able to prevent automatic transmission problems by servicing the transmission and inspecting the fluid every 30,000 miles. If the fluid is dark or burned, the transmission system should be completely flushed.

Maintenance -- Verified

Brake fluid can become dirty and may cause problems in the brake system; it should be flushed every 60,000 miles.

1990 Geo Prizm Questions and Answers

cmerrymary, 1990 Geo Prizm, Tempe, AZ

please provide a fuel system diagram for the vehicle's system. Thank you.

tggarrett71, 1990 Geo Prizm, Albuquerque, NM

what wire is what

tggarrett71, 1990 Geo Prizm, Albuquerque, NM

please provide a diagram

GEOJohn, 1990 Geo Prizm, Bridgeton, NJ

Car died. No spark. Replaced distributor. Still no spark. Found 15 amp. fuse (E.E.G.?) in engine compartment fuse block blown. Replaced at and car started. What caused fuse to blow?

frharper, 1990 Geo Prizm, Stephens City, VA

I need to find the fuses for the power locks and windows for the prizm

Write a Review About Your Car

1990 Geo Prizm Reviews

I have only had this car for less than 2 years. I bought it with 137000 miles on it, and in the year and a half I have owned it, added 50,000 miles. The only real flaws I have noticed with it is that the AC doesn't cool down the car at all. It only cools down the person sitting right in front of it. My little prizm finally broke down a few weeks ago because of the master cylinder. I fixed it for a price of 380 dollars. It drove okay for a few weeks, and now the clutch is gone. The car did me well for a first car to get me back and forth and have some fun. I love the compactness of the car, makes it so easy for me to parallel parking.

I have over 266,000 miles on this car. Very good car. Gets about 38 MPG. Will probably fix the car if it breaks since can't afford to buy another used car right now. Has manual transmission, no AC, heater takes awhile to heat up inside of car. Driver side front window doesn't work properly and probably can't be fixed since part needed now is obsolete but overall a GREAT car. So far, gets me from point A to point B.

not a great car i got rid of mine for a mercury topaz

Love this car. It's our 2nd Prizm. I drive the 2001. They both get great gas mileage. The interior of this car was initially made much better than my 2001.

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