U1412 RAM Code - Implausible Vehicle Speed Signal Received
Quick Answer
The purpose of the monitoring is to detect rationality failures of the input speed and output speed sensor signals, as well as the wheel speed and engine speed, Controller Area Network (CAN) signals. Common causes include Faulty Anti-Lock Brake System (ABS) Module, ABS Module harness is open or shorted, ABS 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
- U1412 RAM indicates Implausible Vehicle Speed Signal Received.
- Common causes
- Common causes include Faulty Anti-Lock Brake System (ABS) Module, ABS Module harness is open or shorted, ABS 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.
Code U1412 RAM Description
What are the Possible Causes of the DTC U1412 RAM?
- Faulty Anti-Lock Brake System (ABS) Module
- ABS Module harness is open or shorted
- ABS Module circuit poor electrical connection
- Faulty Transmission Control Module (TCM) (if code is set on TCM)
- Faulty Powertrain Control Module (PCM) (if code is set on PCM)
How to Fix the DTC U1412 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 U1412 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 U1412 RAM Code
1. What does the OBDII code U1412 RAM mean?
The code U1412 RAM indicates an Implausible Vehicle Speed Signal Received error.
2. What are the common symptoms of U1412 RAM code?
Common symptoms of the U1412 RAM code include issues with the speedometer, ABS warning light on, traction control light on, and potential transmission shifting problems.
3. What are the possible causes of the U1412 RAM code?
Possible causes of the U1412 RAM code include a faulty wheel speed sensor, damaged wiring or connectors, issues with the ABS module, or a malfunctioning powertrain control module (PCM).
4. How do I diagnose the U1412 RAM code?
Diagnosing the U1412 RAM code typically involves using a diagnostic scanner to retrieve the code, checking the wheel speed sensors for proper operation, inspecting the wiring and connectors for damage, and testing the ABS module and PCM for faults.
5. How can I repair the U1412 RAM code?
Repairing the U1412 RAM code may involve replacing a faulty wheel speed sensor, repairing damaged wiring or connectors, resetting the ABS module, or reprogramming the PCM.
6. Can I still drive my vehicle with the U1412 RAM code?
It is not recommended to drive your vehicle with the U1412 RAM code present, as it can affect the proper functioning of important systems like ABS and traction control.
7. How much does it typically cost to repair the U1412 RAM code?
The cost of repairing the U1412 RAM code can vary depending on the underlying cause and the specific repairs needed. Costs may range from a simple sensor replacement to more extensive repairs involving the ABS module or PCM.
8. Will the U1412 RAM code reset on its own?
The U1412 RAM code may reset on its own if the underlying issue is intermittent. However, it is recommended to diagnose and repair the problem to prevent further issues.
9. Can a DIY enthusiast fix the U1412 RAM code?
Depending on the root cause of the U1412 RAM code, some DIY enthusiasts with mechanical and electrical skills may be able to diagnose and repair the issue themselves. However, complex repairs involving the ABS module or PCM may require professional assistance.
10. How often does the U1412 RAM code occur in RAM vehicles?
The U1412 RAM code can occur in RAM vehicles, particularly in models equipped with ABS and traction control systems. Regular maintenance and prompt diagnosis of any related issues can help prevent the code from recurring.
Discuss the causes and fixes for U1412 RAM OBDII Code
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Would standard 225/75R16 tires on the front and 225/65R16 tires on the back of a Promaster 1500, used to level it out with a smaller diameter wheel, cause the "Implausible Vehicle Speed Signal " as the rears are going to rotate faster. ? Is there a simple fix?
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Unfortunately, there really isn’t a good electronic shortcut for this. The ABS module compares the actual speed of each wheel, so changing the programmed tire size won’t correct a front-to-rear diameter difference. One tire-size setting applies to the whole vehicle; it can’t tell the computer to expect the rear wheels to rotate faster than the fronts.
The only reliable fix is to use tires with nearly the same overall diameter on all four wheels. Otherwise you may continue getting U1412 along with ABS, traction-control, or stability-control warnings. Resistors, sensor spacers, or attempts to alter the wheel-speed signals are not recommended because they can interfere with the ABS and stability systems.
A closer-size rear tire may still level the van slightly without creating such a large speed difference, but the rolling diameters should remain very close—generally within about 1% front to rear.
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