Cruise Control problems of the 2000 Volvo S80

Erratic throttle post 10 minutes of drive, much acceleration, not enough acceleration, hesitation, backfires lean. Gets stuck 2nd gear. Cel on. "transmission service urgent" warning message displayed. Cruise control is lost and cannot be turned back on. Obdii pcodes stored 10-29-2006 10:21:18. 464 read stored dtc: p0756 dtc: p1171 dtc: p1181 dtc: p1618 10-29-2006 10:21:18. 474 read stored dtc: p1184 10-29-2006 10:21:18. 474 read stored dtc: p1174 the first code always displayed when the fault occurs. Subsequent continued driving results in the second code pending or permanent. The remaining codes will be added in pairs. First dealer reports I have 18 codes but factory vadis indicates can only store 15 codes maximum. Requested additional $300 to adjust fuel trims, check exhaust and intake leaks, check O2 sensors, work declined. Second dealer reports needs complete transmission. No attempt to solve complaints by dealer, contacted Volvo customer service and they declined to discuss problems, they declined any further involvement. Car had salvage title 2+ years ago from minor accident which prematurely deployed air bags, repaired and returned to service. I am retired ase master mechanic, service manager, and sae member, this is not a transmission issue but caused by the erratic actions of the throttle body system and module. Transmission passes all conventional tests. Results stuck in gear can be corrected by cycling the ignition switch off and back on. This can be done by pulling to the side of the road and stopping to cycle the key or traffic permitting placing in neutral and restarting and then back to drive. No observed failures above 65 mph. TSB send wrong signals to "network" are translated as instructions resulting in poor fuel consumption, high emissions, abnormal wear and tear on transmission, ignition switch, starter, and related components for normal operation, plus a dangerous driving condition.

My 2000 Volvo S80 2. 9 vehicle started surging then hesitating, back & forth, at all speeds up to 70 mph interstate speeds while cruise control was on and off. When cruise control is on, after about 5-10 miles, cruise control turns itself off & car suddenly starts decelerating. After about 1 week of this, on 6/30/06 performance reduced message appeared. On 6-24-06 engine service required message appeared for a short time. After stopping and turning motor off for about 30 minutes to read owner's manual, started motor again & message has not reappeared. When cruise turns itself off, you cannot turn cruise back on until motor is stopped & restarted, then you can turn cruise control back on for about 5-10 miles then it will go back off. Surging and hesitation continues with steady pressure on accelerator (trying to maintain constant speed) and cruise control off.

I own a my 2000 Volvo S80 2. 9. Upon driving in town the car suddenly lost acceleration and engine started shaking. The message reader prompted me to stop and restart the engine. Well I did, in the turning lane, but it did not help. I pulled out of the cross section "shaking". My mechanic says the onboard computer prompts him to a faulty engine throttle module. Well this car has only 48000 miles on it. On the same note: on my 1999 s70 glt at around 60000 miles the same part had to be replaced, because it shut down the cruise control time-to-time.

1. Following download of recall software performance has been vastly reduced and now only achieves 8. 2 mpg. 2. The abs control module functions intermittently and usually in the failure mode. Abs brakes do not function properly-replacement $950 3. While backing (cold engine), brakes fail to stop the car for several seconds (feet). 4. The vehicle stalls mostly on turns but on straight away. A. Car now shuts off approx 6-8 times while driving, dangerous while driving at interstate/highway speeds. It "surges" forward and the lights (dash and headlights) fade - vehicle stalls with no power steering or power brakes. 5. Cruise control fails ã‚?? up hills/down hills shuts down. Now is inoperable. 6. The electronic door locks malfunction intermittently. 7. Following error codes display and total mileage, trip 1 & 2 mileage displays default to ã‚?? --------ã‚?? and mileage does not log on the odometer: a. Brake failure stop ASAP b. Coolant level low stop ASAP c. Abs failure / service required d. Stc service required e. Power steering failure - service required f. Emission system service required g. Stop safely and restart engine h. Alarm system service required I. Alarm triggered j. Emission system service required k. No oil pressure stop ASAP l. Check engine. The ball joint, driver side window motor, sunroof switch were replaced. Numerous bulb replacements and replacement of mass flow sensor. The cooling fan malfunctioned. The abs control module would function intermittently which would cause the abs to not function. The power steering failed. The vehicle will completely shut off while driving. The cruise control was inconsistent, the vehicle would loose power with the cruise activated. The electronic doors malfunctioned, the fob does not always open the door and at times when closing the driver side door. Updated 12/15/06.