AutoCodes – RAM – U059F RAM

U059F RAM Code - Invalid Data Received From NOX Sensor 'B'

Quick Answer

The aftertreatment system is equipped with two NOx Sensors and modules. Common causes include Faulty Nitrogen Oxide (NOx) Sensor 1/2, Nitrogen Oxide (NOx) Sensor 1/2 harness is open or shorted, Nitrogen Oxide (NOx) Sensor 1/2 circuit poor electrical connection. 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: U059F RAM indicates Invalid Data Received From NOX Sensor 'B'.
Common causes: Common causes include Faulty Nitrogen Oxide (NOx) Sensor 1/2, Nitrogen Oxide (NOx) Sensor 1/2 harness is open or shorted, Nitrogen Oxide (NOx) Sensor 1/2 circuit poor electrical connection.
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 6,841

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U059F RAM Description

The aftertreatment system is equipped with two NOx Sensors and modules. The upstream Nitrogen Oxide (NOx) Sensor 1/1 is located before the SCR Catalyst and is permanently connected to a corresponding NOx Sensor Module mounted on the right frame rail. 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 also 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. The PCM will illuminate the MIL lamp immediately after the monitor runs and fails. The PCM will turn off the MIL Lamp after the monitor runs and passes for three consecutive trips.

OBDII Code U059F RAM - Invalid Data Received From NOX Sensor 'B' - AutoCodes.com — U059F RAM Code - Invalid Data Received From NOX Sensor 'B'

What does this mean?

What are the Possible Causes of the DTC U059F RAM?

Faulty Nitrogen Oxide (NOx) Sensor 1/2
Nitrogen Oxide (NOx) Sensor 1/2 harness is open or shorted
Nitrogen Oxide (NOx) Sensor 1/2 circuit poor electrical connection

How to Fix the DTC U059F RAM?

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 U059F RAM 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 U059F RAM Code

1. What does OBDII code U059F mean for a RAM vehicle?

Code U059F indicates "Invalid Data Received From NOX Sensor 'B'," meaning the vehicle's computer has detected faulty or corrupted data coming from the secondary NOx (Nitrogen Oxide) sensor.

2. What are the common symptoms of the U059F code in a RAM truck?

Symptoms may include the check engine light turning on, reduced fuel efficiency, poor engine performance, or the vehicle entering limp mode.

3. What causes the U059F code to appear?

The code can be triggered by a malfunctioning NOx sensor, wiring issues such as damaged or corroded connectors, a software glitch in the powertrain control module (PCM), or excessive buildup in the exhaust system.

4. Can I still drive my RAM with the U059F code active?

While it might be possible to drive, it is not recommended as the issue can lead to poor emissions performance, damage to the catalytic converter, or reduced fuel efficiency.

5. How do I diagnose the U059F code on my RAM?

Use an OBDII scanner to confirm the code, inspect the wiring and connectors for damage or corrosion, and test the NOx sensor for proper functionality using a multimeter or specialized diagnostic tool.

6. What repairs are typically needed for the U059F code?

Repairs may include replacing the faulty NOx sensor, repairing or replacing damaged wiring or connectors, updating the PCM software, or cleaning the exhaust system if buildup is present.

7. How much does it cost to fix the U059F code on a RAM?

Repair costs can range from $200 to $600 or more, depending on whether the NOx sensor, wiring, or PCM needs replacement or repair.

8. Can a dirty or clogged exhaust system cause the U059F code?

Yes, excessive buildup in the exhaust system can interfere with the NOx sensor's ability to provide accurate data, potentially triggering this code.

9. Will resetting the check engine light fix the U059F code?

Resetting the check engine light may temporarily clear the code, but the underlying issue must be resolved to prevent the code from returning.

10. Is the U059F code covered under warranty for my RAM?

It depends on your vehicle's warranty coverage. Emissions-related components like NOx sensors may be covered under the federal emissions warranty or an extended powertrain warranty. Check with your dealer for specifics.