U05AA RAM Code - Implausible Data Received From Charge Air Cooler Coolant Pump
Quick Answer
To improve engine performance the Charge Air Cooler (CAC) system is used to reduce the temperature of the air entering the combustion chambers. Common causes include Faulty Auxiliary Coolant Pump, Auxiliary Coolant Pump harness is open or shorted, Auxiliary Coolant Pump 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
- U05AA RAM indicates Implausible Data Received From Charge Air Cooler Coolant Pump.
- Common causes
- Common causes include Faulty Auxiliary Coolant Pump, Auxiliary Coolant Pump harness is open or shorted, Auxiliary Coolant Pump 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.
Code U05AA RAM Description
The Auxiliary Coolant Pump is a smart device that contains a LIN Bus communication module and a coolant pump. To maintain a desired charge air temperature, the PCM sends a pump speed command over the LIN bus to the internal Auxiliary Coolant Pump. The internal Auxiliary Coolant Pump module controls the pump speed/coolant flow rate using Pulse-Width Modulation (PWM). The Auxiliary Coolant Pump assembly monitors for internal system circuit and performance failures. If a fault occurs the Auxiliary Coolant Pump module sends the fault information to the PCM through the dedicated LIN Bus. The PCM processes the information received, then sets the correlating fault.
What are the Possible Causes of the DTC U05AA RAM?
- Faulty Auxiliary Coolant Pump
- Auxiliary Coolant Pump harness is open or shorted
- Auxiliary Coolant Pump circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
How to Fix the DTC U05AA 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 U05AA 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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Frequently Asked Questions about U05AA RAM Code
1. What are common symptoms of the OBDII code U05AA related to the charge air cooler coolant pump?
The common symptoms include engine overheating, poor engine performance, and potential coolant leaks.
2. What are the possible causes of the U05AA code "Implausible Data Received From Charge Air Cooler Coolant Pump"?
Possible causes can include a malfunctioning charge air cooler coolant pump, wiring issues, or a faulty control module.
3. How can I diagnose the U05AA code related to the charge air cooler coolant pump?
Diagnosis typically involves checking the coolant pump for proper operation, inspecting the wiring for damage, and using a diagnostic scanner to read the code and data.
4. What are some repair tips for addressing the U05AA code?
Repair tips may include replacing the charge air cooler coolant pump, repairing any damaged wiring, and resetting the fault code with a diagnostic tool after the repairs are completed.
5. Is it safe to continue driving with the U05AA code present?
It is not recommended to drive with the U05AA code as it can lead to potential engine damage or overheating. It is best to address the issue promptly.
6. Can I reset the U05AA code without addressing the underlying issue?
While you can clear the code temporarily, the underlying issue causing the code will persist. It is always best to address the root cause to prevent future problems.
7. How much does it typically cost to repair the U05AA code related to the charge air cooler coolant pump?
The cost of repairs can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.
8. Are there any preventative measures to avoid encountering the U05AA code in the future?
Routine maintenance, such as regular coolant system checks and inspections, can help prevent issues with the charge air cooler coolant pump that may trigger the U05AA code.
9. Can a DIY enthusiast repair the U05AA code issue on their own?
Depending on the DIY enthusiast's skill level and access to tools, some may be able to address simple issues related to the charge air cooler coolant pump causing the U05AA code. However, more complex problems may require professional assistance.
10. How urgent is it to address the U05AA code related to the charge air cooler coolant pump?
It is important to address the U05AA code promptly to prevent potential engine damage or overheating. Ignoring the issue can lead to more severe problems down the line.
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