99 Q45t TCS off/SLIP lights on after service

[Luvmy99Q45]

After a recent service that included new coils and plugs, both knock sensors, and a converter, my TCS off and SLIP lights were on. The service tech erased the codes and the lights went out for about 10 miles and returned and stayed on. The car had a miss and wouldn't idle, but runs and idles nicely now with the lights on or off. These lights had never come on before. Any guidance would be appreciated.

[loystock]

Take it back to the shop and tell them that you never have had this problem before the repair. Maybe a connector was left disconnected or wiring damaged during the repair. If the shop technicians are really knowledgeable about your car, then they should know that there is a built-in diagnostic available (involves a jumper wire to Data Link Connector) that can identify the problem (relay, wheel sensor, actuator, etc.) with your car.

[NightRiderQ45]

this is a easy solution! take it back! You paid money for them to fix a issue...hopefully they didn't cause something trying to fix the original problem.