What causes P1400 on a Honda?

Faulty DPFE sensor stuck at low voltage Corroded or loose DPFE sensor connector Cracked or collapsed DPFE reference hoses Carbon-fouled EGR valve skewing pressure readings Chafed DPFE signal wiring shorted to ground

How do I fix P1400 on a Honda?

Confirm the code and freeze frame data with an HDS scan tool Visually inspect the DPFE sensor, hoses, and connector for damage Backprobe the DPFE signal wire and compare voltage to spec at idle Clean and test the EGR valve and passages for carbon restriction Replace the DPFE sensor if voltage stays low, then clear and road test

P1400 Differential Pressure Feedback Electronic Sensor Circuit Low Voltage

Q: What does P1400 mean on a Honda?

P1400 — Differential Pressure Feedback Electronic Sensor Circuit Low Voltage. Applies to Accord, Civic.

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

What does P1400 mean on a Honda?

P1400 — Differential Pressure Feedback Electronic Sensor Circuit Low Voltage. This Honda-enhanced code applies to Accord, Civic.

Common causes of P1400

Faulty DPFE sensor stuck at low voltage
Corroded or loose DPFE sensor connector
Cracked or collapsed DPFE reference hoses
Carbon-fouled EGR valve skewing pressure readings
Chafed DPFE signal wiring shorted to ground

How to fix P1400

Confirm the code and freeze frame data with an HDS scan tool
Visually inspect the DPFE sensor, hoses, and connector for damage
Backprobe the DPFE signal wire and compare voltage to spec at idle
Clean and test the EGR valve and passages for carbon restriction
Replace the DPFE sensor if voltage stays low, then clear and road test