manueltiger42

LFA Radiator Oil Pressure Defect

I'm reporting an issue with my 2011 Lexus LFA with a gasoline engine. At 191562 kilometers, the car shows symptoms of a radiator oil pressure defect. The transmission indicator and check engine lights are on. The automatic transmission is in emergency mode, causing slippage and unclean gear changes. I also hear grinding during shifts, and there's an error code stored. I suspect a cable or plug connection issue. Has anyone else seen this with their LFA?

A 2011 Lexus LFA owner reported a radiator oil pressure defect, with symptoms including transmission indicator and check engine lights, emergency mode activation, gear slippage, unclean shifts, and grinding noises. The suspected cause was a cable or plug connection issue. Another owner suggested checking coolant levels and oil cooler lines for leaks, which could affect radiator pressure. Ultimately, the problem was identified as a defective cable connection, resolved with a repair costing 95€.

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4 comment(s)

Wow, that sounds familiar. I had almost the same symptoms in my LFA. The grinding was the worst. Have you checked the coolant level lately? Low coolant could mean a leak affecting the radiator pressure. Also, check the oil cooler lines. Sometimes they develop small leaks that are hard to spot but cause pressure drops.

Thanks for the quick reply. I appreciate the coolant level and oil cooler line insights. I haven't checked the oil cooler lines for minor leaks, focusing on the radiator connections. Could you tell me where the oil cooler lines are and how you found those subtle leaks?

The oil cooler lines run along the bottom of the radiator – you'll need to get under the car to see them. I missed the leak at first because it was so slow, the coolant evaporated before it dripped. I'd suggest a workshop; a pressure test will pinpoint it quickly. Better safe than sorry with these transmissions!

I appreciate the advice. A pressure test at a workshop seems best. Turns out, it was a defective cable connection, causing a faulty pressure reading. The repair was 95€.

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LEXUS

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LFA