2010 Acura TL Owner's Manual - Page 563
2010 Acura TL Manual
Page 563 highlights
Malfunction Indicator Lamp If this indicator comes on while driving, it means one of the engine's emissions control systems may have a problem. Even though you may feel no difference in your vehicle's performance, it can reduce your fuel economy and cause increased emissions. Continued operation may cause serious damage. If you have recently refueled your vehicle, the indicator coming on could be due to a loose or missing fuel fill cap. Tighten the cap until it clicks at least once. Tightening the cap will not turn the indicator off immediately; it can take several days of normal driving. If the indicator comes on repeatedly, even though it may go off as you continue driving, have the vehicle checked by your dealer as soon as possible. Readiness Code Your vehicle has certain ''readiness codes'' that are part of the on-board diagnostics for the emissions systems. In some states, part of the emissions testing is to make sure these codes are set. If they are not set, the test cannot be completed. If the battery in your vehicle has been disconnected or gone dead, these codes may be erased. It takes several days of driving under various conditions to set the codes again. If you keep driving with the malf unction indicator lamp on, you can damage your vehicle's emissions controls and engine. Those repairs may not be covered by your vehicle's warranties. If your vehicle has an automatic transmission, the malfunction indicator lamp may also come on with the ''D'' indicator. You will also see a ''CHECK EMISSION SYSTEM'' message on the multi-information display. 560 2010 TL