AutoCodes – RAM – U05A5 RAM

U05A5 RAM Code - Implausible Data Received From Ammonia Sensor

Quick Answer

The Powertrain Control Module (PCM) monitors the Ammonia Sensor. Common causes include Faulty Ammonia Sensor Module, Ammonia Sensor Module harness is open or shorted, Ammonia Sensor Module 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: U05A5 RAM indicates Implausible Data Received From Ammonia Sensor.
Common causes: Common causes include Faulty Ammonia Sensor Module, Ammonia Sensor Module harness is open or shorted, Ammonia Sensor Module 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 3,235

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 U05A5 RAM Description

The Powertrain Control Module (PCM) monitors the Ammonia Sensor. The Diagnostic Trouble Code (DTC) sets when an unexpected data link message was sent to the PCM form the Ammonia Sensor Module and was unable to be interpreted.

OBDII Code U05A5 RAM - Implausible Data Received From Ammonia Sensor - AutoCodes.com — U05A5 RAM Code - Implausible Data Received From Ammonia Sensor

What does this mean?

What are the Possible Causes of the DTC U05A5 RAM?

Faulty Ammonia Sensor Module
Ammonia Sensor Module harness is open or shorted
Ammonia Sensor Module circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC U05A5 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 U05A5 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 U05A5 RAM Code

1. What are the common symptoms of OBDII code U05A5 related to the Ammonia Sensor?

- Common symptoms include poor engine performance, reduced fuel efficiency, and the illumination of the Check Engine Light.

2. What are the potential causes of OBDII code U05A5 indicating Implausible Data Received From the Ammonia Sensor?

- Possible causes may include a faulty ammonia sensor, wiring issues, sensor calibration problems, or issues with the vehicle's onboard computer.

3. How can I diagnose the issue related to OBDII code U05A5 RAM for the Ammonia Sensor?

- Diagnostic steps may involve checking the sensor's wiring for damage, testing the sensor's voltage output, and verifying the sensor's calibration using specialized diagnostic tools.

4. Can I continue driving my vehicle with the U05A5 OBDII code triggered?

- It is not recommended to continue driving with this code active, as it can lead to further damage to the vehicle and potentially affect emissions compliance.

5. How do I repair OBDII code U05A5 indicating Implausible Data Received From the Ammonia Sensor?

- Repairs may involve replacing the faulty ammonia sensor, repairing damaged wiring, recalibrating the sensor, or resetting the vehicle's onboard computer.

6. Are there any DIY tips for resolving the U05A5 code related to the Ammonia Sensor?

- DIY enthusiasts can try checking the sensor connections, inspecting for visible damage, and ensuring all connections are secure before seeking professional help.

7. Will resetting the Check Engine Light resolve the U05A5 OBDII code issue?

- Resetting the Check Engine Light may temporarily turn off the light, but it will not fix the underlying problem causing the U05A5 code related to the Ammonia Sensor.

8. What is the function of the Ammonia Sensor in the vehicle's emission control system?

- The Ammonia Sensor monitors the level of ammonia in the exhaust gas to ensure efficient operation of the Selective Catalytic Reduction (SCR) system for emissions control.

9. Can a malfunctioning Ammonia Sensor impact the vehicle's emissions and environmental compliance?

- Yes, a malfunctioning Ammonia Sensor can lead to increased emissions of harmful pollutants, affecting the vehicle's compliance with environmental regulations.

10. How long does it typically take to repair the U05A5 OBDII code issue related to the Ammonia Sensor?

- Repair times can vary depending on the specific cause of the issue, but it is recommended to have the problem diagnosed and repaired as soon as possible to prevent further damage.