Peugeot 208 Radiator Oil Pressure Issue

I'm experiencing a radiator oil pressure issue with my 2012 Peugeot 208 (gasoline engine, 183235 km). The transmission indicator and check engine lights are illuminated. The automatic transmission is in emergency mode, shifts are abnormal with slipping and grinding noises. Error codes are stored. Could a defective cable or plug connection to the component be the likely cause?

4 comment(s)

Interesting. Slipping and grinding definitely point towards transmission woes. Radiator oil pressure? Are you sure it's not a transmission oil cooler issue, or perhaps related to the cooling fan circuit? Have you checked the coolant level and for any obvious leaks around the radiator and oil cooler?

The error message specifically mentions the radiator oil pressure sensor. I haven't checked the coolant level yet, but I haven't noticed any visible leaks. If it's the sensor, would that cause the transmission to go into emergency mode?

A faulty radiator oil pressure sensor could trigger limp mode if the ECU interprets the incorrect pressure reading as a critical fault that could damage the transmission. Still, given the symptoms, I'd recommend a thorough diagnostic check at a workshop before replacing parts. It's possible the sensor is a symptom, not the root cause.

Thanks for the advice. It turned out to be a faulty cable connection to the sensor, as suspected. Repair cost was 95€.

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