Guys,
i did an UIM LIM a few weeks ago, along with all required and recommended parts from the sites guideline. No problems, however I recently got 2 codes- Autozone scanned it and the codes were:
P0401 Exhaust Gas Recirculation Flow Insufficient Detected
P0128 Coolant Thermostat Malfunction
Car now stumbles and runs erratic, but seems to idle fine. Can anyone make a suggestion? I do have a 2001 car to swap some parts around on for diagnosis.
Car does have 225,000 on it, but has been pretty well maintained. Any advice appreciated. Thanks!
2001 Bonneville Engine Codes
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kennedyrec
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- Year and Trim: 2001 SLE
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J Wikoff
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2009 G8 GT - Location: Central Illinois
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Re: 2001 Bonneville Engine Codes
What does the temp gauge do? Go too high, or does it take too long to get warm?
WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser, 3.45 diff and various Camaro suspension bits, LED Taillights
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ChilinMichael
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Re: 2001 Bonneville Engine Codes
Check the pipe going to the EGR on the driver's side of the motor. Make sure it didn't get cracked or otherwise damaged during the work.
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kennedyrec
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Re: 2001 Bonneville Engine Codes
It is slow on warm up and I am planning on changing the t-stat. Long story but could not get one when finishing up on the intake work. Does get to 195 ish when operating at our recent morn/eve temps of 30 degrees or so. I was very careful around the EGR piping when wrenching and just checked and it appears fine. I do have a brand new AC Delco EGR on my kitchen counter but dont really want to change unless neccesary.
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ChilinMichael
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Re: 2001 Bonneville Engine Codes
EGR on Kitchen Counter? Yea...you've been hanging around us too much already. 
Change that T-stat and see where you get especially if you feel it's taking a long time to warm up...
As far as the EGR...There can be small cuts in the pipe that can even cause an issue that you'll barely see...
Change that T-stat and see where you get especially if you feel it's taking a long time to warm up...
As far as the EGR...There can be small cuts in the pipe that can even cause an issue that you'll barely see...
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kennedyrec
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Re: 2001 Bonneville Engine Codes
huh, bad MAP sensor. And new plug wires. And a new t-stat.
Anyone have a recommendation on a non-oem replacement MAP?
Anyone have a recommendation on a non-oem replacement MAP?