Question about 1999 Pontiac Sunfire

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99 pontiac sunfire runs rough and has no power changed o2 censer in the front,changed all spark plugs

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Might be a bad catalytic converter or the timing jumped.

Posted on Dec 01, 2010

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Posted on Jan 02, 2017

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Code p1137 2002 pontiac sunfire


Change O2 Sensor number 2 which is down stream after the cat. Low voltage during power enrichment sensor 2

Jun 03, 2014 | 2002 Pontiac Sunfire

1 Answer

My 1999 pontiac sunfire 2.2 liters did not pass the e-test. I feel that something tells my computer to run rich at 2000 rpm. I changed the spark plugs and the air filter. After driving 200 Klm. the engin...


The code P0137 means that your downstream O2 sensor has low volts. A rich running engine makes the voltage go high, not low. If the upstream sensor is not reading a rich or lean condition, then you need to replace your downstream O2 sensor.

Dec 21, 2011 | 1999 Pontiac Sunfire

1 Answer

99 Pontiac Sunfir. having problems with my check engine light. Throws a code PO141 Replaced the O2 sensor, spark plugs, spark wires, and air filter. what else can it be. Please help!!


I think it,s your check engine light. but if theres still a problem check to see if your battery is chargeing you might need a new battery . let me know

Mar 28, 2011 | Pontiac Sunfire Cars & Trucks

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My 98 Sunfire is idling very rough. How do I check if it's a miss fire or something else. just recently replaced fuel filter and plugs


did you just replace the plugs or replace ignition wires, rotor, and cap (or) ignition coils if applicable? and you check whether its fuel or spark problem by running the engine and taking the plug wire off the spark plug and seeing if there is spark and noting any change in the engine, if the engine runs rough(er) or stalls then you know there is no problem spark related with that cylender, if no change occours when you take the plug wire off the plug then you know there is either a no spark condition (you will be able to see if this is the case) or if there is spark and it is a fuel problem. self explanatory, if everything you test for passes then you probably have internal engine damage. recommended that you use rubber grip pliers when you take the plug wires off while the engine is running, do not ground yourself. Hope this helps! Joseph.

Dec 04, 2010 | 1998 Pontiac Sunfire

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Is it difficult to change spark plugs in a 2004 sunfire. It's running really rough and I hope this is the prob.


No not really they are usally right there on top of mtor if im not mistaking.that motor is a a 2.2 ecotech, theke you sure you use a/c delco spark plugs because if you dont you will be changing them agian.

Jan 10, 2010 | 2004 Pontiac Sunfire

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I havce a 2000 pontiac sunfire and the trac off light came on and the check engine light is flashing. I changed spark plugs, cables, and an injector that was bad but the lights are still on. the car runs...


i can't remember what year sunfire's were effected but there was a update to reflash the PCM for a O2 sensor code
if the check engine light comes on it disables the traction control
i know before GM dealers were the only ones with the program to update the PCM
hope this helps

Nov 12, 2009 | 2001 Pontiac Sunfire

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