Question about 2001 Oldsmobile Alero

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Check engine light on wanting to stall out is it the back or front sensor put on tester and it said it was the sensor

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  • Oldsmobile Master
  • 4,977 Answers

If you put it on a tester what was the code and sensor you don`t say.you need to supply this information in order to get an answer.

Posted on Apr 05, 2011

  • dwoolley773 Apr 05, 2011

    they said it was the 02 sensor

  • robert wales Apr 06, 2011

    the code number helps when determining which sensor it is.however it is usually the front sensor that goes bad and sets a code which is the sensor in front of the catalytic converter.some cars had 2 front sensors one monitoring left side and one monitoring the right side of the engine.the rear sensor is the sensor after the converter.

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I guess I should start by saying the code did not say the sensor was bad. It probably said the sensor signal was out of range.
If replacing the sensor fixed the code but the engine still runs rough and stalls, it could be a leaking injector or a problem with the throttle body.
You would need to know which cylinder is causing the miss.

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The solution is you can:
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2.Repair short, open, or high resistance on o2 signal circuit. FB.init("dd7d9e9681341cde77587bc6a2029f6f"); OBD-Codes.com on Facebook

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1997 pontiac grand prix gt stutters on take off


Check the coil packs and EGR:
Exhaust Gas Recirculation System Operation Application of the Exhaust Gas Recirculation (EGR) gases is regulated by the Powertrain Control Module (PCM). It is based on engine coolant temperature, engine speed, vehicle speed, throttle angle and Manifold Absolute Pressure (MAP). The operation of the EGR system is monitored by the PCM, which allows gases to flow at a calculated rate and compares it against MAP sensor and oxygen sensor activity. The PCM anticipates an increase in MAP voltage and an increase in O2 sensor voltage.
Electrically operated vacuum control solenoids used to control the flow of vacuum to the EGR valve, rely on pulse-width duty cycle commands from the PCM to control its operation. Using input values and the operating conditions previously mentioned the PCM completes the electrical circuit for the solenoid to allow vacuum operation of the EGR.
In addition to solenoids controlling vacuum flow, the incorporation of a back pressure transducer regulates vacuum signals independently of electrical signals. When back pressure in the exhaust system is low, the transducer pintle is open and manifold vacuum is allowed to bleed off. As back pressure increases the amount of vacuum allowed to bleed off is reduced resulting in more vacuum being applied to the valve. This allows air pressure to open the valve.
The following symptoms can be caused by a faulty EGR valve due to loose connection, bad grounds, high resistance in the circuit, or opens in the circuit.
Related Symptoms
  • Stalling on deceleration
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---
coil packs:
Diagnosis and Testing Secondary Spark Test These spark tester looks just like a spark plug, attach the clip to ground and crank the engine to check for spark 91052p10.jpg
This spark tester has an adjustable air-gap for measuring spark strength and testing different voltage ignition systems 91052p11.jpg
Attach the clip to ground and crank the engine to check for spark 91052p12.jpg
This spark tester is the easiest to use just place it on a plug wire and the spark voltage is detected and the bulb on the top will flash with each pulse 91052p10.jpg
The best way to perform this procedure is to use a spark tester (available at most automotive parts stores). Three types of spark testers are commonly available. The Neon Bulb type is connected to the spark plug wire and flashes with each ignition pulse. The Air Gap type must be adjusted to the individual spark plug gap specified for the engine. The last type of spark plug tester looks like a spark plug with a grounding clip on the side, but there is no side electrode for the spark to jump to. The last two types of testers allows the user to not only detect the presence of spark, but also the intensity (orange/yellow is weak, blue is strong).
  1. Disconnect a spark plug wire at the spark plug end.
  2. Connect the plug wire to the spark tester and ground the tester to an appropriate location on the engine.
  3. Crank the engine and check for spark at the tester.
  4. If spark exists at the tester, the ignition system is functioning properly.
  5. If spark does not exist at the spark plug wire, perform diagnosis of the ignition system using individual component diagnosis procedures.
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If you are getting a CEL (Check Engine Light) then figure out the code. This is an OBD-I engine so you need to connect the appropriate test connector and count the blinking lights. (Google Subaru OBD-1 codes).
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1 Answer

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