2013 Jeep Compass P0480 Engine Fault Code: AC On Causes Check Engine Light - Diagnosis & Fix
Hi everyone, Last weekend, I purchased a 2013 Jeep Compass with a 2.4-liter engine for my wife. After just two days of driving, the check engine light turned on. I used an OBD2 scanner to read the fault code, which showed P0480 — indicating a cooling fan control issue related to the AC system. I cleared the code and continued driving with the air conditioning off. After about one hour of driving, when I pressed the AC button, the check engine light turned on again. Important note: The engine warning light activated only when the AC was turned on — all other functions (like speed, lights, and climate control) worked normally. I'm now unsure whether this points to a faulty AC evaporator or a small sensor switch behind it. Does anyone have experience with this specific P0480 issue in the 2013 Jeep Compass? Is there a known fix involving the AC control module or a relay? Any insights, troubleshooting steps, or similar experiences would be greatly appreciated.
The P0480 code in a 2013 Jeep Compass typically indicates an issue with the AC cooling fan control circuit. This can stem from a faulty AC evaporator switch, a wiring problem, or a malfunctioning sensor behind the AC unit. It's not always a full AC element failure — often a small switch or relay is at fault. Check for loose connections and ensure the AC control module is receiving proper voltage. Many owners have found that replacing the evaporator temperature sensor resolves this issue. Always verify with an OBD2 scan to confirm the code persists after repairs.