What does code P1186 mean?

Q: What does code P1186 mean?

FTS Low Fuel Pump Temperature Sensor Low. P1186 on Ford vehicles means the powertrain control module has detected a low signal from the Fuel Temperature Sensor (FTS) circuit, which on many Ford diesel applications is integrated into the fuel pump and monitors fuel temperature for injection timing and pump protection. The computer sets this code when the sensor voltage stays below the expected threshold for a calibrated time, indicating an open circuit, a short to ground, or a sensor that has failed low.

DTC codes / Ford codes / P1186

P1186 · FordFTS Low Fuel Pump Temperature Sensor Low

P1186 on Ford vehicles means the powertrain control module has detected a low signal from the Fuel Temperature Sensor (FTS) circuit, which on many Ford diesel applications is integrated into the fuel pump and monitors fuel temperature for injection timing and pump protection. The computer sets this code when the sensor voltage stays below the expected threshold for a calibrated time, indicating an open circuit, a short to ground, or a sensor that has failed low.

SystemPowertrain

Code typeFord specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering

Guidance is general and written for Ford vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.