Gwm steed 2. 5 2011, the engine malfunction light comes on, but engine runs fine. Then later it goes off, but the next day it comes on again.

SOURCE: Check Engine Light Comes on Intermittently

The P0141 code points to the O2 sensor heater circuit. It could be that there is a short in the wiring to the O2 sensor or it could be that the O2 sensor heating element itself is bad. The code is for O2 sensor Bank 1 Sensor 2. Bank 1 means its the O2 sensor connected to the exhaust pipe that runs to cylinder #1. Sensor 2 means that it is likely the O2 sensor after the catalytic converter on the same exhaust pipe.

SOURCE: We have a 2005 Honda crv. Malfunction indicator

Hello Michael.
While your fuel cap may still be an issue there are many other items that may be at fault. It's possible the fuel cap tightening is a coincidence and something else is causing the problem.
There are a few hundred possibilities that could turn on your MIL.
First thing that needs to be done is verify what the code is that turns on the light. If you are in the USA Autozone will give you a free scan to start you off. Then you can begin to home in on the problem.
Best of the festive season to you.

KL

SOURCE: emission control system malfunction code po446

Code p0446 is for EVAP vent valve performance. Unfortionly there isn't just one item that can cause this code and the test require the use of a scanner. You can do a visual check but other then that with out scanner its just going to be replace and hope. That could wind up being exspensive.

Testimonial: "where is the evap control module located?"

SOURCE: I have a 2006 Trailblazer. When it is cold

Code P0171 is a lean oxygen sensor code for bank 1 on your engine. Bank 1 is always the side of the engine where #1 cylider is located.

There are a couple of Technical Service Bulletins (TSB's) that may apply to your problem.

Bulletin No.: 09-06-03-004C
This bulletin covers intermittent problems due to oxidation problems in some of the wiring connectors.

Bulletin No.: 03-06-04-030G
This bulletin outlines repair proceedures for clogged or restricted fuel injectors.

The only other thing I can think of would be a vacuum leak that occurs only in cold ambient temperatures and only affects bank 1. (possible intake manifold gasket or something similar.)

SOURCE: i have a gwm steed 2.8 tdi. my power dissapears

hi this is a turbo problem, i have the same issue if you remove the air filter pipe from the turbo and check the play on the axle you'll notice that it is way loose