It's a simple 3-wire connector. Grey for 5V reference, green for signal to the PCM, and orange w/ black stripe for ground. All 3 wires check out fine, but obviously the PCM thinks the voltage signal it's receiving is too low. No drivability issues whatsoever. I cannot find any vacuum leaks. I'm thinking about ordering a new MAP sensor and pigtail, but wanted to see what you guys think first.