What does code P1106 mean?

P1106 · FordDual Alternator Lower Fault Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage

P1106 on Ford vehicles indicates that the powertrain control module (PCM) has detected an intermittent high-voltage condition on the manifold absolute pressure (MAP) sensor circuit, specifically on the lower or secondary alternator circuit path in dual-alternator configurations. The PCM monitors the MAP sensor signal and flags this code when the voltage momentarily exceeds the expected range, often due to a loose connection or electrical interference rather than a failed sensor.

SystemPowertrain

Code typeFord specific

SeverityLow

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.