Starter Problems of 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.

See all problems of the 2000 Volvo S80 🔎.