P0407

EGR Sensor B Circuit Low

Severity: Low Emission Control Generic OBD-II Code Est. Repair: $150 - $400

Usually safe to drive short-term, but diagnose soon.

Quick Answer

P0407 means “EGR Sensor B Circuit Low.” Severity: Low. Estimated repair cost: $150 - $400. Most common sign: CEL.

What Does P0407 Mean?

Second EGR sensor (some systems have two) reading low.

Common Symptoms

CEL

Possible Causes

Faulty sensor
Wiring short

How to Fix P0407 – Repair Guide

Test sensor
Inspect wiring
Replace as needed
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Budgeting for This Repair?

A typical P0407 repair runs about $150 - $400. If you'd rather spread the cost over time, estimate the payment with our free sister tool: Car Finance Calculator (50-state sales tax, trade-in equity, full amortization).

Recommended OBD2 Scanners & Tools

To read and clear this code yourself, you need a reliable OBD2 scanner. Here are top-rated options:

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FIXD Bluetooth OBD2 Scanner

Simple plug-and-play sensor that explains codes in plain English via free app. Ideal for first-time users.

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Disclaimer: Information is for educational reference only and does not replace professional diagnosis. Actual causes and costs vary by vehicle make, model, year and condition. Always verify with a qualified technician.