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Igot a 2004 gmc sierra 2500hd chk engine light came on so i put a obd2 can and it shows the code p0894 whats the meaning of this code?

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  • 49 Answers

Has something to do with torqe converter fluid it may be low on transmission fluid or ya need to change transmission filter and fluid

Posted on Mar 29, 2015


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Posted on Jan 02, 2017

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SOURCE: I have a 2004 Gmc Envoy putting out a code of 0128

It means the car has not reached operating temp. The computer wants the engine a certain temp so it can go into "closed loop" where it fine tunes the fuel mix for optimum economy and emissions. If it cannot reach that temp it sets that code. You either have a low coolant level or a stuck open/missing thermostat.

Posted on Jan 10, 2010

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SOURCE: replacement of water pump on 2004 gmc sierra

Remove or disconnect the following:

Air outlet duct Coolant Inlet radiator hose from the water pump Upper fan shroud Cooling fan and clutch assembly Drive belt Radiator outlet hose from the coolant pump Surge tank hose Heater hose Water pump


DO NOT use cooling system seal tabs (or similar compounds) unless otherwise instructed. The use of cooling system seal tabs (or similar compounds) may restrict coolant flow through the passages of the cooling system or the engine components. Restricted coolant flow may cause engine overheating and/or damage to the cooling system or the engine components/assembly.

Install or connect the following:

Water pump. Install the water pump bolts. Tighten the water pump bolts first pass to 11 ft. lbs. (15 Nm); tighten the bolts final pass to 22 ft. lbs. (30 Nm). Water pump drive belt pulley and bolts (if applicable). Tighten the pulley bolts first pass to 89 inch lbs. (10 Nm); tighten the bolts final pass to 18 ft. lbs. (25 Nm). Surge tank hose Heater hose Outlet radiator hose to the coolant pump Drive belt Cooling fan and clutch assembly Upper fan shroud Inlet radiator hose to the water pump Air inlet duct Coolant

Posted on Jan 15, 2010

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SOURCE: I am getting codes Po449 and P0455 on my 2004 GMC

This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

Assuming you put on the proper gas cap and one of high quality, I would inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary.

Posted on Mar 12, 2010

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SOURCE: i have a 2000 gmc sierra 1500 2wheel drive engine

A P1415 indicates a problem with the A.I.R. system. This code is a common indicator of an electric a.i.r. injector reactor problem. Sounds complex but it's not. There are two of these reactors on your engine. They are the black things that the secondary air pipe plugs into at the exhaust pipe/or/exhaust manifold. It is worth changing both of them becauses if one fails the other is not far behind. It is also worth replacing the factory hose clamp with a regular one---you'll see what I mean.BTW--P1415 specificaly indicates a problem with Bank 1 of the A.I.R. system. Make sure both sides of the A.I.R. system are in order--meaning all the hoses are tight and secure--no leaks--cracked hoses ETC.

Posted on Aug 10, 2010

  • 335 Answers

SOURCE: 2004 chevy 2500HD Truck OBD2 trouble code P0101

Hello and welcome. this code P0101 indicates a problem with the mass air flow sensor. this usually requires the replacement of the mass air flow sensor. but there will be a few checks to be made before the sensor can be condemmed

Posted on Oct 24, 2010

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Sorry for taking so long to get back to you, doing the holiday thing with the family. From what I read from both Transflow and GMC. When tieing into the purple, both the Trax gage and OEM gage will work. The purple should be the relay wire to the ECD, controlling the low fuel warning lamp. The Trax gage uses this wire to monitor and show the capacity of the stock tank. I'm going to say that you have the wrong wire, however, if you're dead sure you have the right wire, Transflow's web site has a listing for local techs or installers, you may want to give one a call. After all, it is an electrical device and they do fail even when new. Goes back to that whole "lowest" bidder thing.

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