Originally Posted by islandbimmer
broken wire or sensor . On the e36's they often fell out of their sockets and dangled underneath the bumper till you curbed them. Check the sensor see if the wires look oK .
On my E46, it was chipmunk damage to the wiring near the sensor. While it didn't throw a SES light, the A/C compressor (thinking it was well below freezing) wouldn't come on.