AutoCodes – Dodge – U029E Dodge

U029E Dodge Code - Lost Communication With NOX Sensor 'B'

Quick Answer

The aftertreatment system is equipped with two NOx Sensors and modules. Common causes include Low Battery Voltage, Faulty Nitrogen Oxide (NOx) Sensor Bank 'B', Nitrogen Oxide (NOx) Sensor Bank 'B' harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U029E Dodge indicates Lost Communication With NOX Sensor 'B'.
Common causes: Common causes include Low Battery Voltage, Faulty Nitrogen Oxide (NOx) Sensor Bank 'B', Nitrogen Oxide (NOx) Sensor Bank 'B' harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 2,017

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U029E Dodge Description

The aftertreatment system is equipped with two NOx Sensors and modules. The upstream NOx Sensor 1/1 is located on the Turbocharger elbow downpipe and is permanently connected to a corresponding NOx Sensor Module mounted to the hot side of the engine block. The downstream NOx Sensor 1/2 is located at the outlet of the SCR Catalyst and is permanently connected to a corresponding NOx Sensor Module which is mounted on the right frame rail. The NOx Sensors and NOx Sensor Modules are calibrated to each other and must be replaced as an assembly. The two NOx Sensor and Module assemblies are not interchangeable. The NOx Sensor Modules are smart devices and communicate with the Powertrain Control Module (PCM) over the J1939 Data Link. The NOx Sensor Modules perform their own internal diagnostics and report malfunctions back to the PCM. The NOx Sensors are used to monitor the efficiency of the SCR Catalyst and dosing system. The PCM will illuminate the Malfunction Indicator Lamp (MIL) after the diagnostic runs and fails in two consecutive drive cycles. The PCM will turn off the MIL immediately after the monitor runs and passes.

OBDII Code U029E Dodge - Lost Communication With NOX Sensor 'B' - AutoCodes.com — U029E Dodge Code - Lost Communication With NOX Sensor 'B'

What does this mean?

What are the Possible Causes of the DTC U029E Dodge?

Low Battery Voltage
Faulty Nitrogen Oxide (NOx) Sensor Bank 'B'
Nitrogen Oxide (NOx) Sensor Bank 'B' harness is open or shorted
Nitrogen Oxide (NOx) Sensor Bank 'B' circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC U029E Dodge?

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 U029E Dodge 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.

Frequently Asked Questions about U029E Dodge Code

1. What are the common symptoms of the OBDII code U029E Dodge?

The common symptoms of the U029E code include the Malfunction Indicator Lamp (MIL) being illuminated, poor engine performance, decreased fuel efficiency, and potential NOx sensor-related issues.

2. What could cause the U029E code to appear in a Dodge vehicle?

The U029E code typically appears in Dodge vehicles when there is a communication error between the engine control module (ECM) and the NOx sensor 'B'. This could be due to wiring issues, a faulty sensor, or a problem with the ECM.

3. How can I diagnose the U029E code in my Dodge?

Diagnosing the U029E code involves using a diagnostic scanner to retrieve the fault codes, checking the wiring and connections to the NOx sensor 'B', testing the sensor itself, and verifying communication between the ECM and the sensor.

4. Can I continue driving my Dodge with the U029E code present?

It is not recommended to drive your Dodge with the U029E code present, as it can lead to further engine damage and potential safety hazards. It's best to address the issue promptly.

5. What are some repair tips for fixing the U029E code in a Dodge?

Repair tips for the U029E code may include checking and repairing any damaged wiring, replacing the NOx sensor 'B' if faulty, resetting the codes, and ensuring proper communication between the ECM and the sensor.

6. How serious is the U029E code in a Dodge vehicle?

The U029E code should be taken seriously, as it can impact the overall performance and emissions of your Dodge vehicle. Prompt diagnosis and repair are recommended to prevent further complications.

7. Can a DIY enthusiast fix the U029E code issue in a Dodge?

While some DIY enthusiasts may have the skills to diagnose and repair the U029E code, it is recommended to seek professional help, especially when dealing with complex electrical systems and sensors.

8. How much does it cost to repair the U029E code in a Dodge?

The cost of repairing the U029E code in a Dodge can vary depending on the underlying cause of the issue, the need for parts replacement, and labor costs. It's best to consult a mechanic for an accurate estimate.

9. Are there any recalls related to the U029E code in Dodge vehicles?

Recalls related to the U029E code may vary by model and year. It's advisable to check with your local Dodge dealership or visit the National Highway Traffic Safety Administration (NHTSA) website for any related recalls.

10. How can I prevent the U029E code from reoccurring in my Dodge?

To prevent the U029E code from reoccurring, it's essential to perform regular maintenance on your vehicle, address any issues promptly, and follow the manufacturer's recommended service schedule for your Dodge.