Xterra Radiator Oil Pressure Issue

Greetings, fellow Xterra enthusiast. The symptoms you describe, coupled with the error code, strongly suggest a malfunction within the cooling system, potentially related to the radiator's oil pressure regulation. Considering your vehicle's mileage (64768 km), it's plausible that a sensor is providing erroneous data, thus triggering the cascade of issues you are experiencing. Have you inspected the cable and plug connections associated with the pressure sensor? A defective connection could indeed be the root cause, mirroring a situation I encountered with my previous vehicle, where a corroded connector led to similar transmission woes.

Thanks for the quick reply! I haven't checked the cable and plug connections yet. Where exactly is the pressure sensor located? Is it easy to get to? I'm not the most experienced mechanic, so any pointers would be great.

Given your level of experience, I must strongly advise against attempting a self-diagnosis of the sensor's position. The sensor's location varies depending on the exact configuration of the cooling system and attempting to identify it without proper documentation could lead to unintended damage or injury. Furthermore, while a defective cable or plug connection is a plausible cause, a malfunctioning sensor or even a deeper issue within the transmission itself cannot be entirely dismissed at this stage. Given the symptoms and the potential for further complications, I suggest seeking professional assistance from a qualified mechanic. Doing so will not only ensure an accurate diagnosis but also prevent potentially costly repairs down the line.

Thanks for the advice! I took it to a local shop, and you were spot on. Turns out it was a bad connection on the pressure sensor. They cleaned it up and replaced a small section of the cable. Total cost was only 95€. Runs like a charm now!