AboutTed Ritter Expertise I have more than 26 years experience as toyota technician, I will be able to answer most questions related to the toyota product line up to the present year models, I specialize in difficult to diagnose problems but when posting a question please keep in mind that some situations require the used of special test equipment and diagnostic procedures especially as the newer models become more technologically advanced, so without actually having the car on hand I may only be able to try to steer you in the right direction and in some cases may have to refer you to the toyota dealer but at least you will know what you may be dealing with. Please don't hesitate to ask any questions, I will have an answer for you in most cases. When posting a question keep in mind that I reside in the US, although I get questions from all over the world I may not have an answer for models that are not sold in the US, I will do a reasonable search to try to match your model to the US model,please refrain from asking about diesel powered vehicles, I have no information for them. In most cases I will not answer questions about major modifications of OEM components, engine swapping or aftermarket products,please post a question not a statement, please provide enough basic information such as year, model, what engine and if anything has already been done to fix the problem, the more information I get the more I can help without having to ask you more questions.
Experience Toyota technician since 1979,expert in electrical systems,OBD systems,engine repair, driveability problems,EFI systems,ASE certified,Toyota master technician. Certified Hybrid Vehicle technician.
Education/Credentials Toyota master technician, ASE certified in eight catagories, Hybrid vehicle certified.
Question Hello, I have a 94 previa non-supercharged with 214000 miles on it. When I
start it up it runs real rough until normal operating temperature is reached.
Once it it warmed up it runs fine. I have had a engine light on for months but
it was running fine until recently. I tried a code reading, counting the
flashing lights, and came up with the following: 21,25,43. Also during the
light flashing sequence the oil light will flash occassionally. Is this normal?
I have done nothing yet but run a little fuel injector cleaner through it which
didn't help. Could this be a sensor or what? Just wondering where I should
start first?
Thanks.
Answer These are oxygen sensor malfunction codes, they are probably set by the rough running or engine misfire condition, I think it would be a good idea to have it tested for a blown head gasket or other internal combustion leak, the oil light flashing is not normal and is another issue,have you checked the oil level of the engine as well as the reservoir under the hood?
