U1407 RAM Code - Implausible Engine Torque Request Signal Received
Quick Answer
The Diagnostic Trouble Code (DTC) sets when the Transmission Control Module (TCM) receives a Signal Not Available (SNA) message from the Powertrain Control Module (PCM) or an incorrect Controller Area Network (CAN) message from the PCM. Common causes include Check for Powertrain Control Module (PCM) codes, Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) 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
- U1407 RAM indicates Implausible Engine Torque Request Signal Received.
- Common causes
- Common causes include Check for Powertrain Control Module (PCM) codes, Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) 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.
Code U1407 RAM Description
What are the Possible Causes of the DTC U1407 RAM?
- Check for Powertrain Control Module (PCM) codes
- 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 U1407 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 U1407 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 U1407 RAM Code
1. What does the OBDII code U1407 mean?
The U1407 code indicates that the vehicle's control modules detected an implausible or inconsistent engine torque request signal.
2. What are the common symptoms of the U1407 code?
Symptoms may include reduced engine performance, poor acceleration, erratic shifting, or the check engine light being illuminated.
3. What causes the U1407 code to appear?
Common causes include a malfunctioning throttle body, faulty torque sensor, wiring issues, software glitches in the ECU, or communication errors between control modules.
4. Can a dirty throttle body cause the U1407 code?
Yes, a dirty or malfunctioning throttle body can cause incorrect engine torque signals, triggering the U1407 code.
5. How do I diagnose the U1407 code?
Start by scanning for stored codes, inspecting wiring and connections, testing sensors like the throttle position sensor, and verifying module communication using a diagnostic tool.
6. Is it safe to drive with the U1407 code?
Driving with the U1407 code may be unsafe due to potential issues like reduced engine performance or unresponsive acceleration, which could compromise vehicle control.
7. How do I fix the U1407 code?
Repairs may include cleaning or replacing the throttle body, repairing damaged wiring or connectors, updating the ECU software, or replacing faulty sensors.
8. Can a faulty ECU cause the U1407 code?
Yes, a malfunctioning ECU or corrupted software can lead to improper torque signal interpretation, resulting in the U1407 code.
9. Will clearing the code solve the issue?
Clearing the code may temporarily turn off the check engine light, but the underlying problem needs to be addressed to prevent the code from returning.
10. What tools do I need to repair the U1407 code?
You’ll need an OBDII scanner, a multimeter for testing wiring, and possibly cleaning tools or replacement parts like sensors or a throttle body.
Discuss the causes and fixes for U1407 RAM OBDII Code
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