Question about 1996 Isuzu Trooper
The exhaust path there must be clear
end to end, its NOT air that is EGR fail for exh. flow, for EGR only.
which engine, ?????
no 2 engines made use the same flow.
Posted on Mar 20, 2017
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Posted on Jan 02, 2017
There is a system that monitors how well your egr system is working and it is saying that it is not. The egr valve is just one small part of that system. The plumbing could be plugged or the monitoring sensor, if it has one could be bad. I'll check into this a little further and get back.
Posted on Mar 19, 2009
Not familiar with vehicle but "rule of thumb". It's usually located under the wiper panel (high up )in the engine compartment and close to the heater motor assy itself . The replacement filter will give you some notion of size and location . Good Luck
Posted on Apr 11, 2010
Your SUV is really giving you a hard time, lol. Sorry but I've had those days too.
I would try to check if you have blocked EGR passages. If ok check for restricted MAP sensor vacuum hose/passage or restricted exhaust. I know you replaced the CAT but if the muffler is blocked then there would still be a restriction. Also check the wiring and connection to the MAP sensor.
Posted on Apr 28, 2010
It should just unbolt. The problem is those tend to get frozen to the exhaust manifold, especially the higher mileage ones. Once you get it of, let it set in carb cleaner for awhile. If you have a flexable wire gun stock type brush, this will help aid you in this. You might even try a local machine shop for the carb solvent if you do not have any.
Posted on Feb 10, 2011
Unfortunately, most of the conditions that can initiate the P401 fault code require that signals be read off an analyzer.
Potential issues include a faulty MAP sensor, a blockage in the exhaust system (possibly the catalytic convertor), excessive deposits on the EGR valve, or the EGR valve itself is defective.
And yes, a faulty connection at the harness can activate those DTC numbers. P1406 usually indicates a fault with the PCM.
You might want to have it analyzed and let them tell you what part is defective then change it yourself.
Posted on Apr 22, 2011
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