What causes P1406 on a Honda?

Failed EGR valve lift/position sensor Open or short in the position sensor signal wire Poor ground at the EGR valve connector Carbon-jammed valve giving false position feedback Faulty ECM sensor reference circuit

How do I fix P1406 on a Honda?

Compare commanded versus actual EGR lift in HDS datalist Unplug and inspect the EGR connector pins for corrosion or spread terminals Test sensor reference voltage, ground, and signal with a multimeter Clean carbon from the valve so it can reach its commanded position Replace the EGR valve assembly if the sensor reads out of range, then verify

P1406 Exhaust Gas Recirculation (EGR) Valve Position Sensor - Circuit Problem

Q: What does P1406 mean on a Honda?

P1406 — Exhaust Gas Recirculation (EGR) Valve Position Sensor - Circuit Problem. Applies to Civic, Accord, CR-V, Odyssey.

Category: Powertrain - Auxiliary Emissions Controls
Severity: Check Engine Light
Applies to: Civic, Accord, CR-V, Odyssey

What does P1406 mean on a Honda?

P1406 — Exhaust Gas Recirculation (EGR) Valve Position Sensor - Circuit Problem. This Honda-enhanced code applies to Civic, Accord, CR-V, Odyssey.

Common causes of P1406

Failed EGR valve lift/position sensor
Open or short in the position sensor signal wire
Poor ground at the EGR valve connector
Carbon-jammed valve giving false position feedback
Faulty ECM sensor reference circuit

How to fix P1406

Compare commanded versus actual EGR lift in HDS datalist
Unplug and inspect the EGR connector pins for corrosion or spread terminals
Test sensor reference voltage, ground, and signal with a multimeter
Clean carbon from the valve so it can reach its commanded position
Replace the EGR valve assembly if the sensor reads out of range, then verify