20 Most Recent 2002 Oldsmobile Alero - Page 2 Questions & Answers


Depending on the radio option for your car, the radio may be locked to the VIN number of the car, or by code entered into the radio (see your vehicle's user manual). If it is locked by code, you must have the code that was previously set. If it is by VIN, only a GM dealer can do that for you.

2002 Oldsmobile... | Answered on Oct 16, 2017


The vehicle theft deterrent system is designed in order to prevent vehicle theft by disabling the fuel injectors unless the lock cylinder is correctly engaged by a mechanical key. The theft deterrent system uses the following 4 components for theft prevention:
• The lock cylinder
• The ignition switch
• The body control module (BCM)
• The powertrain control module (PCM)
When starting the engine, the PCM searches for a password from the BCM through the Class 2 serial data circuit. If the password is not recognized or not present, the PCM will disable the engine. Two modes of tamper detection are provided:
No password received
The engine will start and stall quickly. SECURITY telltale will flash on the instrument panel cluster (IPC) and then stay ON steady.
Incorrect or disable password received (More than 3 invalid passwords are received)
The engine is disabled for at least 10 minutes and the SECURITY telltale will illuminate solid on the IPC during the 10 minutes.
After the vehicle has passed theft detection, the PCM will continue normal operation.

Passlock™ Lock Cylinder
The Passlock™ lock cylinder is a locking cylinder that turns a rotating magnet past a stationary hall effect sensor. This action creates the Passlock™ cylinder data. The Passlock™ cylinder data is sent to the Body Control Module (BCM). The Passlock™ lock cylinder is interfaced with the BCM via a 3-wire connection:
• Power
• Ground
• Data

Powertrain Control Module (PCM)
The Powertrain Control Module (PCM) is located on the lower left side of the instrument panel.
The PCM communicates with the Body Control Module (BCM) via serial data over the class 2 serial data bus, CKT 1807. When the BCM determines a passed theft condition, the BCM sends a coded password to the PCM. When the PCM receives the correct password, the PCM enables the fuel injection system, allowing the vehicle to operate correctly. The PCM may allow the car to start and quickly stall during a failed theft condition.
The following conditions may cause the PCM to enter a tamper mode:
• A bad timing cycle
• An incorrect password
If the BCM does not receive a password within a preset time window, the BCM will enter a short tamper mode. During this mode, the PCM will not allow the car to operate for 4 seconds.
If the password is incorrect, the PCM will enter the long tamper mode. In the long tamper mode, the following actions will occur:
• The THEFT SYSTEM indicator will flash.
• The fuel injectors will be shut off for approximately 10 minutes.
Although the vehicle may start, the engine will quickly stall due to a fuel cut-off.
In the event of an open in the serial data communication between the BCM and the PCM, the following actions occur:
• The PCM will become fail-enabled if the car has already passed theft for that ignition cycle (i.e. the engine is running).
• The PCM may set the diagnostic trouble codes (DTC).
• The THEFT SYSTEM indicator will light continuously.
• The PCM will become fail-enabled for future ignition cycles.
If a failure occurs in serial data before the ignition cycle, while the PCM is not fail-enabled, the PCM will never receive a valid password in order to enable the continued use of the fuel injectors.

Your best bet , take to a qualified repair shop .
DTC B2947 Security System Sensor Power CKT Low
DTC B2948 Security System Sensor Power CKT High
DTC B2957 Security System Sensor Data Circuit Low
DTC B2958 Security System Sensor Data Circuit High
DTC B2960 Sec Sys Sensor Data Incorrect but Valid
DTC B3031 Security System Controller in Learn Mode
DTC B3033 Security System Indicates Tamper

2002 Oldsmobile... | Answered on Aug 12, 2017


Possibly the internals of the muffler (baffles)

2002 Oldsmobile... | Answered on Aug 01, 2017


you have 2 fuses, one under the hood fuse #46 and one under the dash fuse L, both are 10A, if they are both good replace your control panel.

2002 Oldsmobile... | Answered on Jul 27, 2017


file:///C:/DOCUME~1/Chuck/LOCALS~1/Temp/Rar$DR16.485/2004_oldsmobile_alero_owners.pdf

open this up and go under electrical systems and u will find the fuse diagram in there.

Ps: hope this helps

2002 Oldsmobile... | Answered on Jul 27, 2017


pop off the inner plastic panel on the inside of the mirror mount area and you will see 3 bolts/nuts the remove the mirror.

2002 Oldsmobile... | Answered on Jul 24, 2017


4 or 6 cyl and yes most of them are close to the oil filter

2002 Oldsmobile... | Answered on Jun 27, 2017


Plugged catalytic converter ?

2002 Oldsmobile... | Answered on Jun 25, 2017


Accelerator cable may be sticking and not allowing the throttle to fully close when there is no pressure on the gas pedal. Check the cable at the throttle body to make sure the throttle is fully closing. This can also because by a faulty idle air control (IAC) motor.

2002 Oldsmobile... | Answered on Jun 24, 2017


metal on metal possible will need brake pads and rotors ---as to abs activaction hub goiging bad abs sensor going bad but if driving and the ice and snow and abs activate then thats normal and the sound is the worn brakes

2002 Oldsmobile... | Answered on Jun 10, 2017


ok... the engine compartment is the entire opening under the hood...the coolant surge tank is located at the front, it is usually white plastic with a plastic cap with a warning not to open when hot. hope this helps.

2002 Oldsmobile... | Answered on May 23, 2017


Hi, try unhooking your Negative battery terminal and leaving it unhooked for about 5 minutes, then reconnect it. This should clear any fault codes that are stored in the computer. It's very possible that your BCM, ( Body Control Module) is failing. Take your car to a Mechanic that you trust... Hope this helps.

2002 Oldsmobile... | Answered on May 13, 2017


If the antitheft light is on and the car won't start,turn the key to on position and wait for the antitheft light to flash or go out (can take up to 20 mins)then try and start the vehicle.This is the key relearn procedure when the ignition switch does not read/see the key chip correctly.

2002 Oldsmobile... | Answered on May 05, 2017


on the out put housing pass side small plug 11mm wrench remove while car idling on a level surface add correct fluid type until runs out of hole

2002 Oldsmobile... | Answered on Mar 11, 2017


Look for oil in the coolant, it will make a murky paint like floating substance in the coolant overflow and radiator. If this is the case you may have a leaking head gasket or intake gasket allowing the cooling system water and oil to mix. You may also notice a bluish white smoke from the exhaust when accelerating if the headgasket has failed.

2002 Oldsmobile... | Answered on Feb 14, 2017

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