20 Most Recent 2003 Saturn L-Series Questions & Answers

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.

2003 Saturn... | Answered on Jan 21, 2018

You may have bad bearings in the blower motor. When the car turns, inertia moves the armature to where is not binding momentarily. If so, replace the blower motor. Ask parts store for a remanufactured unit. Dorman makes good aftermarket parts.

2003 Saturn... | Answered on Jan 09, 2018

-Make sure the battery is full and high CCA in order to be able crank at this cold weather.

Good luck


2003 Saturn... | Answered on Dec 27, 2017

it be better if you locate the problem with the help of repair manual it will properly guide you to know the problem and also how to fix the problem the help of manual you can get the manual from the given link http://toolsnyou.com/

2003 Saturn... | Answered on Sep 17, 2017

Check fuel pressure at the injector rail. If good, suspect crankshaft position sensor--when it fails to start, check for sparks by pulling an ignition wire off the coils and holding it close to the coil with an insulated tool while someone cranks the engine. If no sparks, replace the sensor.

2003 Saturn... | Answered on Jul 14, 2017

This engine is fully computer controlled, so what you need to do is have that control module (PCM) scanned for fault codes, that is the first step, other issues like engine failure can not be ruled out either.

2003 Saturn... | Answered on Jul 10, 2017

You need to check the voltage supply to the fuel gauge. If it is the same as the battery voltage the instrument voltage regulator has probably failed.

Instruments require a stable voltage that is substantially lower than battery voltage and this is provided by a small voltage regulator, usually found mounted on the printed circuit of the instrument panel.

2003 Saturn... | Answered on Jun 16, 2017

There is a relay that powers the blower motor circuit . Left I/P fuse box , do you know where that is ? The relay is IGN 3 relay .
Fuse Block- I/P - Left
LF of the passenger compartment, behind the kick panel
Does your car have Manual or automatic climate control ?

2003 Saturn... | Answered on Oct 26, 2016

This could be the fuse check the fuse panel. This could be the resistor in the heater plenum behind the glovebox, it could also be the heater fan motor. The easiest thing to check is the fuse, then use a volt meter on the heater fan motor and if you have voltage there, it is the motor. If not it is most likely the resistor.

2003 Saturn... | Answered on Oct 23, 2016

Three possibilities;
All related to blown fuses,

1- Fuse blown in the engine compartment LH.
2- Fuse blown in the cabin forward LH below the dashboard (below your legs left hand).
3- Fuse blown in the harness (wire bundles) below the dashboard very easy to reach with your hands “just look underneath steering wheel ".

U said " The air conditioner blows, but the air is not cold.
" Yes only the fan working which might receiving power independent all from those other mentioned things.
If all fuses OK. Then look for broken wires.


2003 Saturn... | Answered on Jul 28, 2016

run the fault codes
suspect a problem coolant temperature sensor triggering a shutdown in the ECM to protect the engine or a problem ECM unit

2003 Saturn... | Answered on Jul 20, 2016

2003 years are not always able to program without having to go to the dealership, but you can try turning the key to the "ON" position without the engine running and hold the lock and unlock buttons at the same time for 3-5 seconds. If the doors lock and unlock and the chime sounds you are in luck. If not then a trip to the dealership is in your future. and this is for a factory remote.

2003 Saturn... | Answered on May 12, 2016

DTC P1780 (3.0L (L81))

To improve shift feel, the transmission control module (TCM) may request that the engine control module (ECM) reduce engine torque during shift events. When such a request is received, the ECM responds by retarding the base ignition timing and notifying the TCM that the request has succeeded. If the ECM is unable to comply with the request, the ECM sends the TCM a message that the request has failed.
The torque reduction request is sent to the ECM through a communication network called the controller area network (CAN). Two circuits are used to communicate CAN data between the ECM and TCM. A fault in the CAN will not cause DTC P1780 to set by itself. If a CAN fault occurs, other DTCs will set before DTC P1780.
When the TCM receives a torque reduction failure message from the ECM, then DTC P1780 will set. DTC P1780 is a type C DTC. Take your pick of which you think this code is for , this or the TSB - technical service bulletin. What need to hook up scan tool an data PID'S - Do you know what PID'S are ? sensor data read on a scan tool .

2003 Saturn... | Answered on Mar 04, 2016

#PIP3922: Repeat DTC P0606 And P1780 Setting - keywords 00 01 02 03 04 05 DTC JB L81 MAF MIL P0606 P1780 reducedpwrmde reman saturn - (Sep 26, 2006)

Subject: Repeat DTC P0606 and P1780 Setting

Models: 2000-2005 Saturn L series with L81 V6 The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
A technician may find codes P0606 and P1780 setting. They may state that they are not able to duplicate the concern. Tech may state that when the customer is driving they report a sudden loss of power, then no throttle response, and the warning indicators come on. Tech may also state that the ECM and MAF were replaced with no change.
These codes will set if the wrong MAF was installed on the vehicle previously. This being an intermittent code the MAF may work without any concerns initially. The retailer may not be aware of 2 different part number MAF's for 2000-05 L series with L81. Compounding this is the reman sticker may fall off and GM does not cross reference the Bosch part number to theirs. Any time these codes are setting have technician verify the correct MAF is installed using the reference below
The part numbers are:
2000-03 90528435 Last 3 of Bosch # 184 (important because the reman sticker may be missing)
2004-05 24437651 Last 3 of Bosch # 087 (important because the reman sticker may be missing)
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
GM bulletins are intended for use by professional technicians, NOT a ""do-it-yourselfer"". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

2003 Saturn... | Answered on Mar 04, 2016

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