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For all you Chevy Malibu owners out there, pay attention to OBD2 fault code 59 which means that the transmission fluid temperature sensor circuit is giving off a high voltage error. This usually triggers the check engine light, so your Malibu will alert you if there's a problem. Most of the time, the culprit is the transmission temperature sensor since it's the first thing to check with this code. It's also possible that a wire or wiring harness is faulty, but that typically results in complete failure instead of a high voltage error. Thankfully, you can get a replacement sensor for under $20, but swapping it out can be a bit tedious; set aside a few hours, grab a drink, and get ready to tackle the job.
In a Chevy Malibu, receiving Code 59 signifies a situation where there is an interruption in the fuel pump circuit.