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.
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HOMESERVICE MANUALSFORD2004MUSTANG BASE, 2D COUPE, 3.9 6, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2539 (ENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS - DTC P0600 THROUGH DTC P164A - (EXCEPT DIESEL & HYBRID))DTC P161A: INCORRECT RESPONSE FROM IMMOBILIZER CONTROL MODULE
2004 Ford Mustang Base, 2D Coupe, 3.9 6, Automatic
DTC P161A: Incorrect Response From Immobilizer Control Module
2004 Ford Mustang Base, 2D Coupe, 3.9 6, AutomaticSECTION DTC P161A: Incorrect Response From Immobilizer Control Module
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.
P161A - INCORRECT RESPONSE FROM IMMOBILIZER CONTROL MODULE
| Description: | |||
| Possible Causes: | |||
| Diagnostic Aids: | Refer to the appropriate Anti-Theft - Passive Anti-Theft System (PATS) article. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | Refer to the Description, Possible Causes and Diagnostic Aids for the DTC in table. | ||
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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.