I have a 2000 Saturn L series V6 engine that keeps displaying the "reduced power" light on the dash. When this happens the car is suddenly just barely running and goes about 10 MPH max. However, if I pull the car off the road and wait 10-20 minutes and start it again it sometimes it goes away. But you never know when it is going to switch into this mode and it can happen at very bad times like while making a turn and almost cause an accident. Any ideas what causes this and how to fix?.

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Dec 10, 2012 - Tech Tip: Reduced Engine Power Message Displayed on GM Vehicles ... Model year 2008-'10 vehicles must have the engine control module (ECM) reprogrammed ... Do not drop the electronic throttle control components.

Same issue it was. -20 today so i let it chug away and warm up then turned off restart good to go.

i'll just put some things out there , loose or wiring poblems in starter circuit,ignition switch , starter faulty,battery ?? if auto trans nutral safety ,if standard netural safety on clutch pedal.?
just trying to help good luck hope something works.

This has nothing to do with the heat on the vehicle .
Reduced Power
The reduced power telltale is turned ON by the cluster when it receives a command from the body control module (BCM). The engine control module (ECM) (L81) engine sends a message to the BCM over the CAN serial data link.
The reduced power telltale is illuminated when the ECM is limiting engine torque in a low traction situation. This telltale is used only for the V6 (L81) engine application.
The reduced power telltale is turned ON by the cluster for 2-3 seconds, when the ignition is turned to RUN, for a visual system check.

Taking the vehicle to a qualified repair shop an having it diagnosed would be your best . Unless you have a factory tech 2 scan tool to read BCM DTC'S - diagnostic trouble code's an have factory diagnostic repair info.
Reduced Engine Power Mode
When the ECM detects a condition with the TAC system, the ECM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
• Acceleration limiting--The ECM will continue to use the accelerator pedal for throttle control; however, the vehicle acceleration is limited.
• Limited throttle mode--The ECM will continue to use the accelerator pedal for throttle control; however, the maximum throttle opening is limited.
• Throttle default mode--The ECM will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The ECM will perform the following actions:
• Limit engine speed to idle by positioning the throttle position, or by controlling the fuel and spark if the throttle is turned off.
• Ignore the accelerator pedal input.
• Engine shutdown mode--The ECM will disable fuel and de-energize the throttle actuator.

Transmissions are tied into the function of the newer Saturns which can give you drivablity problems. You should take it too an authorized dealer to have it diagnosed just for that reason alone.

It is going into limp mode. There is a serious problem somewhere. Could be with the engine or transmission. You need to have the ECU scanned to see why it is going into Limp Mode. I suggest you seek professional help.

There is a fault somewhere on the vehicle which has triggered the engine management system to limit engine power to minimize damage.If you have breakdown cover and live in the Uk then call them.You need a computerised diagnosis of the engine.If you live locally then mail me at [email protected] and I will assist you further.

reduced power messge is not caused by oil pressure. i assume this a 3.0L v6. this engine has a electronic throttle body which is a electric motor that operates the throttle plate that takes the place of a throttle cable. in cold weather the pcv (positive crankcase venelation) system accumulates moisture that will form on the throttle plate, in cold weather the water freezes and causes throttle plate to stick. when the ecm detects any malfunction whithin the throttle control circuit it is put in to reduced power mode that limits throttle position. usually resets after ign. is cycled. there is a service bullitin to re-position pcv hose behind throttle plate to reduce moisture bulid-up on throttle plate. your saturn dealer can perform this service.

Yup. The throttle body connectors have a history of failing on these cars. Replace the throttle body and the wire connectors that go to it, and you're back in business. Not terribly difficult and you can get the parts from any dealer. Saturn actually has a bulletin out on this problem but they won't cover it unless you're under warranty - no recall for this.