Service Engine Soon Light Is On
Thread Starter
Teching In
Joined: Dec 2005
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Service Engine Soon Light Is On Im New To The Site , I Just Picked Up A 2000 Ws6 Conveertible With 34k Miles Its A Cream Puff Very Well Taken Care Of 100% Stock The Ses Light Came On So I Took It To Advance Auto And P0171 And Po174 Codes Came Up , The Car Runs Perfectly Idles , And Drives Like A Brand New Car . It Looks Like The Air Cleaner Could Be Original Its Pretty Dirty, The Guy Said It Needs A Mass Air Flow Sensor And A Fuel Regulator Does This Sound Right ?????? With 34k Miles ??????? Does Anybody Know What Code Comes Up When The Gas Cap Is Loose????
It does not need a MAF. I would probably just take it out and inspect it for physical damage or clean it with some carb spray. No fuel regulator. I would clean it and see what happens. Is the honeycomb screen still in place on it?
Does the filter look to be recharged or oiled recently? I know that sometimes if the fiter is oiled and some of that oil gets on the MAF it will throw the reading off and cause the check engine light to come on. I second the motion to just remove it, inspect it, and clean it and then disconnect your positive battery terminal for a minute or two and allow the computer to reset it's self
TECH Senior Member
Joined: Dec 2001
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From: Jacksonville, FL
P0171/P0174 is lean both banks. Clean/inspect the MAF, replace the air filter first. Loose gas cap is P0440. When disconnecting the battery remove the neg cable, or you can reset the PCM this way:
Turn key on, don't start car
Pull PCM BATT and PCM IGN fuses in engine compartment
Wait 5-10 min
Turn ignition off
Replace fuses
Anytime the PCM is reset idle will be grumpy for a few minutes until it relearns.
Turn key on, don't start car
Pull PCM BATT and PCM IGN fuses in engine compartment
Wait 5-10 min
Turn ignition off
Replace fuses
Anytime the PCM is reset idle will be grumpy for a few minutes until it relearns.
Thread Starter
Teching In
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Im, an old school carb guy never worked on one of these when taking out the mass flow is it as simple as unplugging and removing it ? same with the fuel regulator is it under pressure or is that only when the key is on ?
I had those two codes thrown last week. I took off my MAF and cleaned it with pure rubbing alcohol and a Q-tip. After four drive cycles the the SES light went off. However, the code was still listed under History Failed Test. So I did eventually clear the codes out myself. It has not re-appeared.
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Thread Starter
Teching In
Joined: Dec 2005
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po171 and p0174 CrazyCucky, or any one else that can help in order to clean the mass flow sensor all you have to do is unplug it and remove it ???? then clean and install ?Will the car need to be reprogramed after reinstalling ? would most people reset the light by disconnecting the battery or wait for it to cycle 40 times
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the car dosent even need a MAF to run. it sounds like you just baby the car around and dont drive it hard. just ignore the light. there is nothing wrong with your car if it obviously runs and drives A.O.K. SES light pertains to the polution controls almost exclusively and should just be ignored unless you are concered about optiumum performance