Automatic Transmission Control Module Problems of Volvo S80

Failure of 2002 Volvo s-80 transmission with only 46,000 miles but 10 months out of warranty (4 year/ 50000 miles). Dealer found code 5300, tcm 0008. Found internal hydraulic fault in transmission. Shift solenoid s1 replaced transmission. A deal was worked out where Volvo, the dealer and myself each paid 1/3 the cost of $4200. General manager of dealership told me that "Volvo knows they have problem with s-80 transmission".

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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.

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1) engine idles rough, problem became so bad that car stalls at low speeds, lost power steering & "engine dies" at low speeds (unsafe!). Local mech referred to etm warranty program to re-program faulty etm module. Took car to dlr, re-programmed etm car died again! turns out bad battery as well: several hundred $$$ to replace battery. Car does not accelerate smoothly, large "shudders" present when merging onto hwy, during transmission/gear shift. Not good! 2) airbag "srs-urgent service" warning indicator light is on. Good local mech. States this is a $1000 repair. 3) "check brake light" warning indicator light turns on when depressing on brake pedal: good local mech. States that this is "normal" requires exact matching electrical resistance of all brake lamps to ensure that "check brake light" warning does not occur (in actuality the brake lights work fine, the built-in-test is faulty). 4) "check engine light" comes on 2-3 times in last 3 months. Major service was required. One fault was isolated to fuel tank gas cap: if not secured properly "ecm-4308 (leak diagnostic) large leak" occurs. . . Remedied by twisting fuel cap 3 full rotations, after re-fueling gas tank. Good local mech. Diagnosed the loose gas cap problem, warned me about it, and didn't charge me (nice!). 5) body paint is very susceptible to chipping & scratches. Paint or exterior panels are very soft and easily damaged. Another shame, this car looks great but does not hold up very well under typical parking lot conditions (I. E. Someone parked next to you opens their car door into the side of your car resulting in a large scratch). Solution: purchase a fancy car cover and protect the body paint, if you can! 6) parking brake "seems loose", upon parking car and engaging parking brake the vehicle rolls almost 30 cm bwds or fwd depending on level or inclined surface.

3 independent issues: throttle module - vehicle suddenly and unpredictably surges forward, particularly during idle or low speeds while in forward or reverse either stopped or moving, causing potential safety problems. Transmission module - vehicle suddenly and unpredictably looses power, presenting the driving performance of a "slipping" transmission, causing unpredictable responsiveness to changing traffic conditions, and potential safety problems. Front suspension - "knocking" noise from front suspension component(s), causing lack of driving confidence and concerns of driving safety and performance. All 3 of these problems are widely reported as chronic design, performance, safety and reliability issues for the same model years by other Volvo owners. In newer model years, Volvo has made manufacturing changes to address these recognized issues, but has not as yet successfully addressed and responded to these safety issues. Further, these issues have been reported to NHTSA by other Volvo owners.

While driving on an interstate highway at 65-70 mph, my 2001 Volvo S80 t6 displayed a message indicating "reduced power". I was able to steer the car, but pushing the accelerator pedal had no effect. I was forced to maneuver to the shoulder and have the car towed to my local dealer. The car would start and continue to run, but the car would not "go". It was as if the accelerator pedal had been disconnected. This was actually the second time that this has happened to this car. The first occurred a mere 20 months earlier. The Volvo mechanic indicated - during both incidents - that the electronic throttle control module had failed and would need to be replaced. My car was not under warranty either time - had just exceeded warranty mileage when the first incident happened. In addition to being put into a dangerous situation on a crowded interstates highway, I was forced to pay more than $1000 to have the part replaced each time.

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Transmission failure.

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