DTC P1229: Charge Air Cooler (CAC) Pump Driver

WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2006 Mercury Mountaineer, 2006 Mercury Monterey, 2006 Mercury Montego, 2006 Mercury Mariner, and 2006 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.

P1229 - CHARGE AIR COOLER (CAC) PUMP DRIVER

Description:	The charge air cooler (CAC) pump driver DTC sets when the powertrain control module (PCM) commands the supercharger intercooler pump to operate but no current is detected.
Possible Causes:	Pump motor open circuit. Pump relay coil open Open circuit between the relay and pump Pump motor shorted Open circuit between the PCM and the relay Poor pump ground connection
Diagnostic Aids:	Check for voltage at the relay. Check the fuse in the voltage circuit. Check the ground connection of the pump motor. The PID reading is on/off.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to Pinpoint Test KP .