Yes, low transmission fluid can cause the Check Engine Light to come on, although it may not happen immediately. When transmission fluid is too low, the transmission may lose hydraulic pressure and overheat. This can cause slipping, delayed or harsh shifting, incorrect gear ratios, and abnormal readings from transmission sensors. The transmission control module may detect these problems and store a trouble code, which can trigger the Check Engine Light. Common symptoms of low transmission fluid include: Transmission slipping Delayed engagement when shifting into Drive or Reverse Hard or erratic shifting High transmission temperature Whining or humming noises Burning smell Poor acceleration Check Engine Light or transmission warning light Common related diagnostic codes may include P0700, P0711, P0730, or other transmission pressure, temperature, and gear-ratio codes. If the Check Engine Light appears along with transmission symptoms, check the transmission fluid level and condition if your vehicle has a serviceable dipstick. Look for leaks around the transmission pan, cooler lines, seals, and transmission housing. Simply adding fluid may not solve the problem if there is a leak or internal transmission damage. Driving for a long time with insufficient transmission fluid can damage the transmission, so the underlying cause should be diagnosed as soon as possible.
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