Problem with my 2005 Chevy Equinox
V6
dash lights = Check engine light
GM Computer codes = p0171, P0496
Repairs done prior = Had an oil change.
Had the codes scanned at Autozone.
GM tech = jk
question = My check engine light came on a few days after I had an oil change. Had the
computer scanned for codes at Autozone and came up as p0171 lean, and P0496 evap
system purge or something. What are some common causes for this.
V6
dash lights = Check engine light
GM Computer codes = p0171, P0496
Repairs done prior = Had an oil change.
Had the codes scanned at Autozone.
GM tech = jk
question = My check engine light came on a few days after I had an oil change. Had the
computer scanned for codes at Autozone and came up as p0171 lean, and P0496 evap
system purge or something. What are some common causes for this.
Location of possible vent
tube mis-positioned. Under
the coil / ignition assembly.
tube mis-positioned. Under
the coil / ignition assembly.
JK:
The code p0171 is a common code to turn on a check engine light after an oil
change on this vehicle. If the oil change facility checked your air filter, then most
probable cause for this code is that they have accidentally disconnected a vent tube.
This tube goes from the air intake duct on the air filter housing, to the rear valve
cover under the ignition coil / module. (see pic ) Just reach under coils and plug the
hose back into the top of the valve cover.
P0496 is described as "Evaporative emission system purge during non-purge event"
This is usually caused by a faulty purge solenoid. Under the engine cover, on top /
passenger side of intake manifold.
The code p0171 is a common code to turn on a check engine light after an oil
change on this vehicle. If the oil change facility checked your air filter, then most
probable cause for this code is that they have accidentally disconnected a vent tube.
This tube goes from the air intake duct on the air filter housing, to the rear valve
cover under the ignition coil / module. (see pic ) Just reach under coils and plug the
hose back into the top of the valve cover.
P0496 is described as "Evaporative emission system purge during non-purge event"
This is usually caused by a faulty purge solenoid. Under the engine cover, on top /
passenger side of intake manifold.
| 10-11-10 Cant figure out how the hose connection is held on possibly a clip got the breakdown from gm parts on mass air flow sensor tube only calling them for valve cover breakdown later. |
Comments
| That tube is not held into position with anything. It's routing under the ignition module and the rubber grommet in the valve cover hold it in. But when it gets moved as stated above, then it came loose. |
| 10-19-10 Got a breakdown on rear valve cover and the show a small 1in. Bolt with a tiny grommet not inclined to figure out if it goes through the tube. |
| 10-27-10 Had to buy the tube only $10.00. Cost $95.00 for them to put it on. |
| 5-30-11 I have the same problem wit my 05 equinox. I want to know if replacing the tube fixed your problem. pls let me know. |
| 6-19-11 I have A 91 S-10 pickup the problem is when it idles for A while it will miss and then come back and run ok Rod |
| 7-20-11 Sounds like you could just have bad spark plugs and wires or distributor cap. Also maybe a leaking fuel pressure regulator (FPR) |
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| 8-26-11 I recently took my equinox in for Texas state inspection and the car did not pass due to several sensors being off line. Evap, O2 sensor, and EGR system. All with Not Ready reading. I have recently changed the battery however this has been over 300-500 miles ago. I have called several dealers and they suggest more driving. This seems very odd. |
| These tests take very specific conditions to run. I would agree that more driving is needed. Get on the highway at a steady speed for at least 10 minutes, come off and sit at a stop for a few minutes, turn car off and do it again, etc. Test will not run if there are ANY codes stored in the computer. This does not mean the check engine light is on. There could be codes stored in history with no light. |
| 10-20-11 i am also getting the P0496 code on my 2006 equinox and i have replaced this ... This is usually caused by a faulty purge solenoid. Under the engine cover, on top / passenger side of intake manifold. Is there another one i am missing closer to the gas tank, any diagrams or pictures to show me what to look for? Thanks in advance |
| 1-2-12 5.3 liter GMC Envoy code P0455 is that the sensor on top of gas tank. |
| Code P0455 is a large EVAP system leak. That could be caused by several things. A gas cap that is loose or not sealing, a bad vent valve, broken line or the fuel tank pressure sensor (that is on top of the tank). |
