Question about 1993 Jeep Grand Cherokee

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Check engine ligt is on and sounds like its missing.

Some one said maybee o2 sensors could be bad. but havent gotten the codes checked. Could it be something else like the injectors?

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Could be about 100 things. You need to get it checked.

Posted on Jun 15, 2009


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I have my engine light on, in my xg300 Hyundai 2001 if i replace the mass air flow sensor and my fuel air metering my light go off, Im a woman trying too fix my car my self pls help tks code...

check engine light will not go out or codes cleared till computer is cleared so if you have set off a code while trying to diagnose it will stay in memory with that in mind

PO171 & 174 are related to bank 2 lean o2 sensor reading high oxygen in exhaust at sensors
PO120 has to do with throttle position sensor input out of range
PO306 is a misfire in #6 cylinder

in my opinion any miss will cause o2 sensors to read lean because the cyl is in effect a air pump sensors only pick up o2 not the fuel does you engine run rough or hesitate/shaking on acceleration
i would check coil wire and plug for #6 also the injector not working will cause miss also they look ok do compression test on cyl will read 150psi if you find cause of miss you will be able to diagnose lean

with the tps sensor check to see if the connector was disconnected at any time you were testing

basically you need to isolate misfire and fix then have the computer cleared of codes drive car and if engine light comes on then we will go through test procedures for new codes

i hope this helps you to get a few ideals on how to proceed good luck ley me know

Jan 16, 2011 | 2001 Hyundai XG300

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When u drive around 60mph car is holding back engine light is on say after cat h2 sensor checked the plugs got a miss on idole and its got a flat spot

Go to any Autozone or Advance Store and they will check your computer on board to see what code is stored in the computer. It sounds like you have a O2 sensor going bad. Theses sensors are screwed into the exhaust manifold to read back to the computer on board to tell the car if it needs more gas or less gas. Also the 2 auto store that I have listed will check you check engine light codes for FREE. Where most car dealerships will charge you 1 shop hour to tell you what sensor is going bad or is bad. Hope this helps.

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O2 sensors trouble codes come back/after being replaced

What were the codes??? You should have gotten one code if it was only one O2 sensor that went bad. If all three O 2 sensor went bad you would have gotten three different codes. P0031 (bank1 sensor1) P0051 (bank2 sensor2) P0061 to P0064 O2 sensor after the catalytic. Hops this helps. 

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Hello fellow Texan!

AutoZone should have gotten more than 1 code for this problem. The problem could be any number of things from knock sensor to O2 sensors. More information is needed.

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