AutoCodes – Generic – U148C

U148C Code - Implausible Data Received From Stop/Start Button

Quick Answer

The Diagnostic Trouble Code (DTC) will set when the Powertrain Control Module (PCM) receives a Stop/Start Off/On button pressed signal for more than five continuous minutes. Common causes include Faulty Switch Bank Module, Switch Bank Module harness is open or shorted, Switch Bank 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: U148C indicates Implausible Data Received From Stop/Start Button.
Common causes: Common causes include Faulty Switch Bank Module, Switch Bank Module harness is open or shorted, Switch Bank 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 933

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 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U148C Description

The Diagnostic Trouble Code (DTC) will set when the Powertrain Control Module (PCM) receives a Stop/Start Off/On button pressed signal for more than five continuous minutes.

OBDII Code U148C - Implausible Data Received From Stop/Start Button - AutoCodes.com — U148C Code - Implausible Data Received From Stop/Start Button

What does this mean?

What are the Possible Causes of the DTC U148C?

Faulty Switch Bank Module
Switch Bank Module harness is open or shorted
Switch Bank Module circuit poor electrical connection

How to Fix the DTC U148C?

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 U148C 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.

Need more information about the U148C code?

Need more information on how to fix the U148C code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U148C code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U148C Chrysler — Implausible Data Received From Stop/Start Button
U148C Dodge — Implausible Data Received From Stop/Start Button
U148C Jeep — Implausible Data Received From Stop/Start Button
U148C RAM — Implausible Data Received From Stop/Start Button

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 U148C Code

1. What does the OBDII code U148C mean?

The U148C code indicates that the vehicle's control modules have received implausible or inconsistent data from the stop/start button, which may affect functionality.

2. What are the common symptoms of the U148C code?

Symptoms may include the stop/start system not functioning, the engine not starting or shutting off properly, or a check engine light or other warning lights on the dashboard.

3. What causes the U148C code to appear?

Common causes include a faulty stop/start button, wiring or connector issues, a malfunctioning body control module (BCM), or software glitches in the vehicle's communication system.

4. Can I still drive my car with a U148C code?

Yes, you can typically drive the car, but the stop/start system may not operate as intended, and ignoring the issue can lead to further electrical or starting problems.

5. How is the U148C code diagnosed?

A technician will use a diagnostic scanner to read the code, inspect the stop/start button, check wiring and connectors, and test communication between control modules.

6. How do you fix the U148C code?

Repairs may involve replacing the stop/start button, repairing damaged wiring or connectors, reprogramming or updating the BCM, or addressing any software issues.

7. Can a dead battery cause the U148C code?

Yes, a weak or dead battery can cause communication errors between modules, potentially triggering the U148C code.

8. How much does it cost to repair the U148C code?

Repair costs can vary depending on the issue, ranging from $50 for minor wiring fixes to $400 or more if the stop/start button or BCM needs replacement.

9. Can I reset the U148C code without repairs?

While you can clear the code with an OBDII scanner, it may return if the underlying issue is not resolved.

10. Does the U148C code affect other vehicle systems?

It may impact systems that rely on the stop/start button, such as ignition and engine management, but typically does not affect other unrelated systems.