20 Most Recent 2005 Chevrolet Cobalt - Page 2 Questions & Answers

in front of the gear lever, under lighter

Pull the handle to lower the seat, and open the trunk from the inside with the emergency release handle.

The check engine light being on now is a different problem , Have DTC'S - diagnostic trouble codes checked ,will have something to do with electronic throttle control . That is what reduced engine power is about . It's in a reduced power mode. 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. Do you know what electronic throttle control is ? -------------------------------------------------------------------------------- Throttle Actuator Control (TAC) System Description The throttle actuator control (TAC) system delivers improved throttle response and greater reliability and eliminates the need for mechanical cable. The TAC system performs the following functions: • Accelerator pedal position sensing • Throttle positioning to meet driver and engine demands • Throttle position sensing • Internal diagnostics • Cruise control functions • Manage TAC electrical power consumption The TAC system includes the following components: • The accelerator pedal position (APP) sensors • The throttle body assembly • The engine control module (ECM) Your best bet , take it to a qualified repair shop .

General Motors has decided that a defect, which relates to motor vehicle safety, exists in certain 2005-2010 model year Chevrolet Cobalt vehicles; 2005 model year Pontiac Pursuit; 2005-2006 model year Pontiac G4; 2006 model year Pontiac G5 Pursuit; and 2007-2010 model year Pontiac G5 vehicles equipped with electric power steering. Some of these vehicles have a condition in which a sudden loss of power steering assist could occur at any time while driving the vehicle. If the power steering assist is lost, a chime will sound and a "Power Steering" message will be displayed in the Driver Information Center to inform the driver of the condition. Steering control will be maintained, as the vehicle defaults to a manual steering mode. If power steering assist is lost, it may require greater driver effort at low vehicle speeds, for example, below 15 mph (25 km/h). Unless a driver compensates for this additional effort, it may increase the risk of a crash.

It sounds like failing hydraulic pistons in the steering rack/steering box to me!

Well you shouldn't pay to much attention to what some people say . Never use carb. cleaner to clean a mass air flow sensor , they make a special cleaner for mass air flow sensors . And you just spray the sensor an let it air dry ,then put it back together . And as far as dealer's not being able to find this ,i'm sure some may not . Just as any independent repair shop may not . I have thrity years experience at GM dealerships ,started at a Chevy dealer back in 1984 ,right out of a two year automotive technician program . Have worked at Cadillac , pontiac , GMC etc..... Listening to others making guesses as to what the problem is ,mite fix the problem an then again it may not . There are a lot of electronic componets on your vehicle that could cause your problem , looking at sensor data on a capable scan tool is the correct way to find your problem . 007 Idle Speed Problems Scan Data for Idle

Hi, there are 3 different engines for the 2005 Cobalt. I have pasted instructions from Autozone.com for all 3 below. I recommend you run the test also pasted below before buying a new sensor. If your sensor passes the test, please get back to me with your symptoms and/or trouble code for alternate repair advice. Please let me know if you have any questions, and thanks for using FixYa.
Removal & Installation2.0L Engine
Supercharger Inlet Pressure (Scip) Sensor

Fig. Manifold Absolute Pressure (MAP) SCIP sensor location-2.0L engine

1. Disconnect the Supercharger Inlet Pressure (SCIP) sensor harness connector.
2. Remove the SCIP sensor (1) from the supercharger.
   WARNING: If the SCIP sensor seal is damaged, the SCIP sensor must be replaced.
   
3. Inspect the seal for damage.

To install:
NOTE: Use the new SCIP sensor seal provided with the new SCIP sensor.

1. Install the SCIP sensor (1) into the intake manifold. Tighten the bolt to 89 inch lbs. (10 Nm).
2. Connect the SCIP sensor harness connector.

Temperature Manifold Absolute Pressure (Tmap) Sensor

Fig. Manifold Absolute Pressure (MAP) TMAP sensor location-2.0L engine

1. Disconnect the Temperature Manifold Absolute Pressure (TMAP) sensor harness connector.
2. Remove the TMAP sensor from the intake manifold.
   WARNING: If the TMAP sensor seal is damaged, the TMAP sensor must be replaced.
3. Inspect the seal for damage.

To install:
NOTE: Use the new TMAP sensor seal provided with the new TMAP sensor.

1. Install the TMAP sensor into the intake manifold. Tighten the bolt to 89 inch lbs. (10 Nm).
2. Connect the TMAP sensor harness connector.

2.2L & 2.4L Engines

Fig. Manifold Absolute Pressure (MAP) sensor location-2.2L & 2.4L engines

1. Remove the throttle body.
2. Disconnect the engine harness electrical connector from the Manifold Absolute Pressure (MAP) sensor.
3. Remove the MAP sensor and seal.

To install:

1. Lubricate the NEW MAP sensor seal with clean engine oil.
2. Install the MAP sensor into the intake manifold.
3. Connect the engine harness electrical connector to the MAP sensor.
4. Install the throttle body.

Testing

1. Verify the integrity of the entire air induction system by inspecting for the following conditions:
   Any damage to, or hairline fractures of, the MAP sensor housing, Loose or improper installation, Any vacuum leak
2. Verify that restrictions do not exist in the MAP sensor port or vacuum source.
3. Determine the current vehicle testing altitude. Ignition ON, observe the scan tool BARO Sensor parameter.
4. Use the scan tool and compare the MAP Sensor parameter to a known good vehicle, under various operating conditions.

Circuit Testing

Fig. Manifold Absolute Pressure (MAP) connector end view-2.0L & 2.2L engines

Fig. Manifold Absolute Pressure (MAP) connector end view-2.4L engine

NOTE All electrical components and accessories must be turned OFF, and allowed to power down.

1. With the ignition OFF, disconnect the MAP harness connector at the MAP sensor.
2. Test for less than 5 ohms of resistance between the low reference circuit terminal 2 and ground-2.0L & 2.2L (A and ground-2.4L).
   1. If greater than the specified range, test the low reference circuit for an open/high resistance.
   2. If the circuit tests normal, replace the ECM.
3. With the ignition ON, test for 4.8-5.2 volts between the 5 volt reference circuit terminal 1 and ground-2.0L & 2.2L (C and ground-2.4L).
   1. If less than the specified range, test the 5 volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
   2. If greater than the specified range, test the 5 volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
4. Verify the scan tool MAP sensor parameter is less than 1 kPa.
   1. If greater than the specified range, test the signal circuit terminal 3-2.0L & 2.2L for a short to voltage.
   2. If the circuit tests normal, replace the ECM.
5. Install a 3A fused jumper wire between the signal circuit terminal 3-2.0L & 2.2L and the 5 volt reference circuit terminal 1-2.0L & 2.2L. Verify the scan tool MAP sensor parameter is greater than 126 kPa.
   1. If less than the specified range, test the signal circuit terminal 3-2.0L & 2.2L for a short to ground or an open/high resistance.
   2. If the circuit tests normal, replace the ECM.
6. If all circuits test normal, test or replace the MAP sensor.

Component Testing

NOTE You must perform the circuit/system testing, in order to verify the integrity of the MAP sensor circuits, before proceeding with the component testing.

1. Turn ON the ignition, with the engine OFF, and remove the MAP sensor.
2. Install a 3A fused jumper wire between the 5 volt reference circuit terminal 1-2.0L & 2.2L and the corresponding terminal of the MAP sensor.
3. Install a jumper wire between the low reference circuit terminal 2-2.0L & 2.2L of the MAP sensor and ground.
4. Install a jumper wire at terminal 3-2.0L & 2.2L of the MAP sensor.
5. Connect a DMM between the jumper wire from terminal 3 of the MAP sensor and ground.
6. Install the J 35555 to the MAP sensor vacuum port. Slowly apply vacuum to the sensor while observing the voltage on the DMM. The voltage should vary between 0-5.2 volts, without any spikes or dropouts.
7. If the voltage is not within the specified range or is erratic, replace the MAP sensor.

Pull this and push seat back down

There isn't one. What testing have you done? Make sure battery has a full charge. If it cranks good but won't start, have a helper crank it while you visually check for spark at the plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse. If your missing everything check for rpm signal. Any applicable trouble codes? When you first turn on the key, no crank, can you hear the fuel pump run for a couple seconds? There is a fuel pump fuse in underhood fuse box.

clean the idle control sensor and throttle body

What year,make, model vehicle is it? Is it automatic or manual transmission? Front,rear,all wheel or 4 wheel drive ?

Make sure it bolts up to the converter with out any stress, the converter and drive plate must sit flat on each other at the bolt holes , check the spline drive on gear box to the converter is not worn.