Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P1229: - Charge Air Cooler (CAC) Pump Driver
2009 Lincoln Navigator L RWDSECTION DTC P1229: - Charge Air Cooler (CAC) Pump Driver
DTC P1229: - CHARGE AIR COOLER (CAC) PUMP DRIVER
| Description: | This DTC sets when the powertrain control module (PCM) commands the supercharger CAC pump to operate but no current is detected. | ||
| Possible Causes: |
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| Diagnostic Aids: | Check for voltage at the relay. Check the fuse in the voltage circuit. Check the ground connection of the CAC pump motor. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to Pinpoint Test KP . | ||
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.