AutoCodes – Jeep – P0405 Jeep

P0405 Jeep Code - Exhaust Gas Recirculation Position Sensor Circuit Low

Quick Answer

Early Exhaust Gas Recirculation (EGR) systems component s include and EGR Valve, and Engine Control Îœodule (ECÎœ) Controlled Vacuum Switch Valve or EGR Solenoid and an EGR Vacuum Îœodulator. Common causes include Faulty EGR volume control solenoid valve, Carbon built up on EGR valve, EGR volume control solenoid valve harness is open or shorted. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0405 Jeep indicates Exhaust Gas Recirculation Position Sensor Circuit Low .
Common causes: Common causes include Faulty EGR volume control solenoid valve, Carbon built up on EGR valve, EGR volume control solenoid valve harness is open or shorted.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 20,670

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 18, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0405 Jeep Description

Early Exhaust Gas Recirculation (EGR) systems component s include and EGR Valve, and Engine Control Îœodule (ECÎœ) Controlled Vacuum Switch Valve or EGR Solenoid and an EGR Vacuum Îœodulator. Depending on the engine and driving conditions, the ECÎœ will control the EGR Solenoid which will operate the EGR Vacuum Îœodulator to regulate the opening and closing of the EGR Valve.
The EGR system on recently built vehicles uses a step motor to control the flow rate of EGR from exhaust manifold. This motor has four winding phases. It operates according to the output pulse signal of the ECÎœ. Two windings are turned ON and OFF in sequence. Each time an ON pulse is issued, the valve opens or closes, changing the flow rate. When no change in the flow rate is needed, the ECÎœ does not issue the pulse signal. Î‘ certain voltage signal is issued so that the valve remains at that particular opening.

OBDII Code P0405 Jeep - Exhaust Gas Recirculation Position Sensor Circuit Low - AutoCodes.com — P0405 Jeep Code - Exhaust Gas Recirculation Position Sensor Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0405 Jeep?

Faulty EGR volume control solenoid valve
Carbon built up on EGR valve
EGR volume control solenoid valve harness is open or shorted
EGR volume control solenoid valve circuit poor electrical connection
Faulty EGR temperature sensor and circuit

How to Fix the DTC P0405 Jeep?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0405 Jeep code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.