Check engine light comes on and when scoped, shows p0894 trouble code
Found that code very easily on Google. Is is a transmission code in relation to the TCC (torque converter clutch). Could be a lack of maintenance, burnt fluid or debris in the fluid. Could also be a bad TCC solenoid or another internal trans issue. You will more than likely need to visit a qualified transmission repair facility unless you are good with trans internals.
P0894 Chevrolet Description
The Powertrain Control Module (PCM) monitors the difference between engine speed and transmission output speed. In D3 drive range with Torque Converter Clutch (TCC) engaged, the engine speed should closely match the transmission output speed. In D4 drive range, with the TCC engaged, the TCC slip speed should be -20 to +50 RPM.
This is a common problem with a 4L60E automatic. It can be traced to valve body bore wear in the lockup circuit, or the lockup valve in the pump housing. Usually occurs with high mileage vehicles.These one or both valves can be repaired or fixed without removing the transmission. See a REPUTABLE transmission shop. The most it could require is a rebuilt (remachined) valve body. They ream and install a oversize valve. There also is a lockup valve for the pump with a teflon sealing ring that can be bought for less than $50. Directions are on the internet on how to install it by removing the pan. See Sonnax.com for the kit. Try the pump valve $50 first. The cheapest.
If you search online for gm trouble codes,you should be able to find the meaning of each code.or a lot of the local auto parts stores can scan again for free and tell you what you should look at to fix the prob
Your trouble code is transmission related
Check all your vacume lines one may have a crack in it
SOURCE: po452 trouble code changed sensor engine light
you might try unhooking the battiey for 20min both + and - posties cuz that will force the computor to have to resest only if you have addressied the fuel pressure problem which taht would most likly be your filter which isn't all that much
SOURCE: CHECK ENGINE LIGHT ON AND REDUCED POWER LIGHT ON,
Replace your throttle position sensor, runs about $60.00 sit on throttle body has a round connector with three wires going o it.
SOURCE: chevy trailblazer check engine light
P0128 is coolant operating temperature operating too low. This can be contributed to the Thermostat stuck open or faulty electronic radiator fan clutch. This is common, I had the same issue and replaced the thermostat and fan clutch and had the clutch re-programmed (required) at the dealer. As for the P0410, check the air pump fuse, if blown it will set this code on. Also check the air pump hoses for water and cracks. Hopefully this helps!!
SOURCE: what can cause the check engine light for a bank 1
What have the repair shops and dealer diagnosed so far? And what have they done to "fix" the problem? A lean condition sometimes is caused by a vacuum leak in the intake.
. Take the car to a local auto parts store and ask them to use their OBD2 scanner to read the trouble code. Once they do that, they will look up the code description and give you ideas on how to make the repairs. It is usually a free service of the auto parts store
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