AutoCodes – RAM – U1460 RAM

U1460 RAM Code - Engine Idle Speed Message Rationality

Quick Answer

This diagnostic checks the availability and rationality of the Engine Idle Speed signal which is sent by the Engine Control Module (ECM) via a Controller Area Network (CAN) message. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted, Transmission Control Module (TCM) 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: U1460 RAM indicates Engine Idle Speed Message Rationality.
Common causes: Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted, Transmission Control Module (TCM) 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 533

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 May 25, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1460 RAM Description

This diagnostic checks the availability and rationality of the Engine Idle Speed signal which is sent by the Engine Control Module (ECM) via a Controller Area Network (CAN) message. The diagnostic determines the availability by checking the received value is not equal to the Signal Not Available (SNA) default value. Then the diagnostic checks the rationality by confirming the signal value is within the range defined by a lower and upper threshold. When the CAN signal value is below a calibratable lower threshold or it exceeds a calibratable upper threshold or the signal is not available, the Powertrain Control Module (PCM) sends a Signal Not Available (SNA) default value to the PCM. When the PCM reads one of these conditions then the Diagnostic Trouble Code (DTC) U1460 is set.

OBDII Code U1460 RAM - Engine Idle Speed Message Rationality - AutoCodes.com — U1460 RAM Code - Engine Idle Speed Message Rationality

What does this mean?

What are the Possible Causes of the DTC U1460 RAM?

Faulty Transmission Control Module (TCM)
Transmission Control Module (TCM) harness is open or shorted
Transmission Control Module (TCM) circuit poor electrical connection

How to Fix the DTC U1460 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 U1460 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 U1460 RAM Code

1. What are the common symptoms of OBDII code U1460 RAM related to Engine Idle Speed Message Rationality?

- Common symptoms include rough idling, stalling at idle, and fluctuations in engine speed.

2. What are some possible causes of OBDII code U1460 RAM being triggered?

- The code may be triggered by issues with the idle air control valve, throttle body, vacuum leaks, or wiring problems.

3. How can I diagnose the cause of OBDII code U1460 RAM?

- Diagnosing the issue may involve performing a visual inspection of components, checking for vacuum leaks, testing sensors, and using a scan tool to monitor data.

4. Can a dirty throttle body cause OBDII code U1460 RAM?

- Yes, a dirty throttle body can disrupt the engine's idle speed control and potentially trigger the U1460 RAM code.

5. What are some repair tips for addressing OBDII code U1460 RAM?

- Repair tips may include cleaning or replacing the idle air control valve, cleaning the throttle body, fixing any vacuum leaks, and checking the wiring for any damage.

6. Is it safe to continue driving with OBDII code U1460 RAM present?

- It is not recommended to continue driving with this code active, as it can lead to poor engine performance and potential stalling issues.

7. Can a faulty oxygen sensor trigger OBDII code U1460 RAM?

- While a faulty oxygen sensor is not a common cause of this specific code, it can contribute to related issues affecting engine performance.

8. How much does it typically cost to repair OBDII code U1460 RAM?

- Repair costs can vary depending on the specific cause of the code, but it is advisable to consult a mechanic for an accurate diagnosis and cost estimate.

9. Will disconnecting the battery reset OBDII code U1460 RAM?

- Disconnecting the battery may temporarily clear the code, but it is important to address the underlying issue to prevent it from reoccurring.

10. Can a misfire in the engine cylinders trigger OBDII code U1460 RAM?

- While a misfire can impact engine performance, it is not a direct cause of U1460 RAM. However, addressing misfires promptly can help prevent further issues with idle speed control.