P1106 Barometric Pressure Circuit Range Performance Problem

What does P1106 mean on a Honda?

P1106 — Barometric Pressure Circuit Range Performance Problem. This Honda-enhanced code applies to Civic, Accord, CR-V, Odyssey, Pilot.

Common causes of P1106

• Failing BARO sensor inside the ECM/PCM or remotely mounted BARO/MAP assembly
• Corroded or loose wiring and connectors at the MAP/BARO sensor
• Vacuum leaks or a cracked vacuum hose to the MAP sensor skewing pressure readings
• Aftermarket electronics or previous ECM replacement with incorrect calibration

How to fix P1106

1. Connect an HDS scan tool and compare BARO and MAP readings at key-on engine-off against local barometric pressure
2. Inspect MAP/BARO wiring, connectors, and vacuum hoses for damage, moisture, or loose pins
3. Test sensor voltage and ground circuits against Honda service data before replacing anything
4. Replace the MAP/BARO sensor only if readings stay out of range with good wiring and vacuum
5. Clear codes and road-test through varying altitude and load to confirm the fix