Question about 1999 Pontiac Sunfire

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Engine light is on

Hi, engine light is on, sometimes flashes, the engine shutters at low speed and stops. Just replaced plugs, wires and coils.

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To get any diagnostic you need to beg borrow steal or buy a reader and get the actual error code. could be any of several fuel/air/o2 sensors. the light just tells you that the computer cant read something, not what the 'something' is

Posted on Jun 06, 2008

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Posted on Jan 02, 2017

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P0303 Flashing Service Engine Light when driving


The code means a misfire on #3 cylinder .i would change the spark pluges wires if it has any.may also be a bad coil or coil pack.


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OBD code P0320


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Trouble code P0320 ignition/dist. engine speed input circuit


P0320 - Ignition / distributor engine speed circuit malfunction

The ignition engine speed sensor input signal to Powertrain Control Module (PCM) or Electronic Control Module (ECM) is continuously monitored. The test fails when the signal indicates that 2 successive erratic profile ignition pickup (PIP) pulses occurred.

Symptoms:
- Engine Light ON (or Service Engine Soon Warning Light)
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- The engine may be harder to start
- The engine may stumble or stall

When is the code detected?
The P0320 code is triggered when 2 successive erratic PIP pulses are detected.

Possible Causes:
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- Arcing secondary ignition components (coil, wires and plugs)
- Low battery charge
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Possible Solutions:
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- If battery charge is low, recharge or replaced battery
- Replaced crank position sensor
- Replaced starter motor


Test it and tell us news.

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