Last post on Jan 30, 2013 at 6:14 PM
You are in the Chevrolet Impala
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Chevrolet Impala, Sedan
#37 of 45 Re: 2001 chevy impala [dpolite11]
Nov 01, 2011 (4:46 pm)
+My 2002 started doing the same thing when the engine was hot. Felt like either a transmission bucking, or a fuel pump sputtering, or a coil not firing a plug. I could hardly get the car up to speed when accelerating from a stop, and there are no codes thrown. I still need to get it checked, but have seen similar descriptions on the web and in most cases, it's a Torque Converter Clutch (TCC).
I'm going to have it checked next week.
#38 of 45 Re: 2001 chevy impala [jschoenauer]
Nov 03, 2011 (6:56 am)
thats exactly what my 2002 impala is doing with the not accelerating and acting like its not getting enuff gas we had it on the diagnostic machine twice the first time it said a miss fired in cylinder one after we changed the plugs and wires it still was acting crazy we put it on the diagnostic machine again it threw us the code of the egr sensor changed the egr sensor still doing it. I was ready to put a for sale sign in it but I just bought it thanks for your help if you get yours fixed before me let me know if that worked I will do the same for you.
#39 of 45 Re: 2001 chevy impala [jschoenauer]
Nov 03, 2011 (6:59 am)
i also found this bit of information so when u go to have it checked u can let the person know hope it helps both of us
Occasional problems on this vehicle are failures of the Torque Converter Clutch Solenoid, the 2-3 Shift Solenoid and the Transmission Valve Body. A sticking valve in the Transmission Valve Body or a faulty solenoid can cause erratic shifting or the check engine light to come on. The Transmission Valve Body can become dirty and plugged. The cost to repair the Torque Converter Clutch Solenoid is estimated at $40.09 for parts and $312.00 for labor or $331.50 for labor on vehicles with California emissions. The cost to remove and clean the Transmission Valve Body and repair the 2-3 Shift Solenoid is estimated to be $27.80 for parts and $487.50 for labor or $507.00 for labor on vehicles with California emissions. All prices are estimates based on $65.00 per flat rate hour and do not include diagnostic time or any applicable taxes
#40 of 45 Re: 2001 chevy impala [giggleface]
Nov 07, 2011 (10:30 am)
My 2004 Impala with 137,000 miles is getting the valve body repaired to fix the 1-2 shift solenoid and the code P1811 hi pressure fixed that causes the trans to shift hard thru all 4 gears. It also need the accumulator piston replaced which causes the vehicle to slam into gear from a stop sign. Total cost is estimated at $1300. The 4T65E transmission is in almost all GM large FWD cars from the late 1990s until now and they still will not take credit for poor engineering and cheap components. There will never be a recall on these because the new GM will blanme it on the old GM(bankrupt) and deny any resposability just like they did on the 2007-2008 impala rear suspension. I hate to put the money into a car but a car that doesn't run right along with $1300 cash will buy you another used car with a whole new set of problems.
#41 of 45 Re: 2001 chevy impala [giggleface]
Nov 10, 2011 (10:24 am)
Was having an accelerating problem about 2 years ago, it ended up being a burned out, plugged up catalytic converter and it was throwing the EGR sensor code.
#42 of 45 Re: 2001 chevy impala [dpolite11]
Feb 08, 2012 (5:04 pm)
try your MAF senser that was the prob with my 03 it costs about 610 at a dealer ship but it comes with a 12month 12000 mile waranty
Mar 16, 2012 (5:48 pm)
MY HUSBAND HAS BEEN A MECHANIC FOR OVER 40 YRS CERTIFIED....fOR WHAT THAT'S WORTH WITH THIS IMPALA. 2002 3.4 IMPALA..
PARTS WE REPLACED:
CRANK SENSOR 24X
FUEL INJECTORS (6)
WE DID A WHOLE TOP END REMAN, THERE IS NO VACUUM LEAKS. THE ENGINE IS RUNNING GREAT AND SOUNDS GREAT ONLY WHEN YOU HOLD THE THROTTLE OPEN. WE ARE STILL GETTING RANDOM MISFIRES AND THAT'S THE ONLY CODE P300. pLEASE HELP IN OVER 3 YEARS I HAVE SPENT OVER 12,000 ON THIS PIECE OF... BUT I NEED THIS VEHICLE, I HAVE TWO HANDICAPPED BOYS THAT NEED TO GET TO THEIR DR.S APPS
#44 of 45 Stalled start, slightly fluctuating rpms, pf420 inefficiency below thresh
Jan 30, 2013 (6:07 pm)
Every time I go to start my 2001 Chevrolet Impala, it takes at least three tries before it cranks. its giving me what I remembered being a pf420 code below threshold. I replaced my o2 censor before the cat converter but no cigar. I also believe my alternator is falling behind because the brightness of all of the interior and ext lights fluctuates as well.
I was told it was probably a crank sensor but wanted a second opinion before I go spending that money.
#45 of 45 Re: Stalled start, slightly fluctuating rpms, pf420 inefficiency below thresh [ctp2001imp]
Jan 30, 2013 (6:14 pm)
I assume you meant P0420 in your post. I did not see any mention of the crank sensor in this information: http://www.obd-codes.com/p0420
They mention a faulty cat or a faulty O2 sensor. The sensor after the cat is reading the same as the sensor before the cat.