2005 UPLANDER-CHARGING SYSTEM FAILURE CAME ON WARNING ON..BUT MENU SAID ALL WAS FINE WITH BATTERY...

If the security light is on there is a fault in the system this can be any number of failures and needs the system tested by the dealer. No simple answer here.

the "Reduced Engine Power", problem causes the PCM to disable "Service Stability Control" and "Traction Control" turning on the warning lights to come on for those systems . The reduced engine power is because of a problem with the electronic throttle control system or as GM calls it TAC system . Reduced Engine Power Mode
When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
• Acceleration limiting--The PCM will continue to use the accelerator pedal for throttle control, however, the vehicle acceleration is limited.
• Limited throttle mode--The PCM will continue to use the accelerator pedal for throttle control, however, the maximum throttle opening is limited.
• Throttle default mode--The PCM will turn OFF the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The PCM will perform the following actions:
- Limit engine speed to idle by positioning the TP, or by controlling the fuel and spark if the throttle is turned OFF.
- Ignore the accelerator pedal input.
• Engine shutdown mode--The PCM will disable fuel and de-energize the throttle actuator.
© 2017 General Motors Corporation. All rights reserved.



Drive by Wire training Your best bet , take it to a GM dealer

You may have to have the harness replaced. Be sure the connector innards stay dry.When they get wet the contacts will oxidize and start shorting to each other and also the oxide is an insulator causing connections to open. Good Luck, I had a water problem with a Ford Flex and even though covered under warranty since I was the second owner they would not honor it. It cost me about three grand so price things out before getting it fixed, the car may not be worth the investment.

i think you just need to get a new one

Try resetting the alternator, if that doesn't work try changing the battery

If you need further help, I’m available over the phone at https://www.6ya.com/expert/anik_29134a102eb94344

sounds like the air mix rod is out of adjustment or if vacuum controled, its leaking can you hear a noise in the vehicle or can you find a vacuum hose off in the engine bay hope it gives a little help

there may be a problem with the key. take it to a dealer or a qualified repair shop.

your idle air controller valve on the throttle body may be no good.if the idle speed drops too low,the alternator will have no output,and the steering rack which on the uplander i believe is electric like the cobalt,will not put out enough drive.if you shut off the vehicle,but leave the ignition on,and it has an electric rack,the steering should still work.if it doesnt it is hydraulic assist.if the idle speed goes to say 400 rpm,the power steering will not work .when this happens,check the tachometer what the rpm is...

Have the battery tested with and without a load. The alternator can be checked at this time as well.

Its the Battery. These cars Batteries sit at the Factory for who knows how long before Installation. Have even seen Dealers with quick Chargers on the Semi-Truck Transports charging Batteries so they could Unload!