AutoCodes – Generic – P1E46

P1E46 Code - 14 Volt Power Module Temperature Sensor 1 High Temperature Sensing Circuit

Quick Answer

The 14 V power module, also called the accessory DC power control module, constantly monitors system temperature to protect against overheat conditions. Common causes include Program 14 V Power Module, Faulty 14 V Power Module, 14 V Power Module 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: P1E46 indicates 14 Volt Power Module Temperature Sensor 1 High Temperature Sensing Circuit.
Common causes: Common causes include Program 14 V Power Module, Faulty 14 V Power Module, 14 V Power Module 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.

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Code Popularity 1,202

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 Apr 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E46 Description

The 14 V power module, also called the accessory DC power control module, constantly monitors system temperature to protect against overheat conditions. The module also monitors the function of the temperature sensors. These sensors are internal to the 14 V power module and are not serviced separately from the control module.
The 14 V power module is an air cooled component. The 14 V power module vent fan is controlled by the hybrid powertrain control module 2.

OBDII Code P1E46 - 14 Volt Power Module Temperature Sensor 1 High Temperature Sensing Circuit - AutoCodes.com — P1E46 Code - 14 Volt Power Module Temperature Sensor 1 High Temperature Sensing Circuit

What does this mean?

What are the Possible Causes of the DTC P1E46?

Program 14 V Power Module
Faulty 14 V Power Module
14 V Power Module harness is open or shorted
14 V Power Module circuit poor electrical connection

How to Fix the DTC P1E46?

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 P1E46 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 P1E46 code?

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Information for Specific Makes

P1E46 Buick — 14 Volt Power Module Temperature Sensor 1 High Temperature Sensing Circuit
P1E46 Cadillac — 14 Volt Power Module Temperature Sensor 1 High Temperature Sensing Circuit
P1E46 Chevrolet — 14 Volt Power Module Temperature Sensor 1 High Temperature Sensing Circuit
P1E46 GMC — 14 Volt Power Module Temperature Sensor 1 High Temperature Sensing Circuit
P1E46 Saturn — 14 Volt Power Module Temperature Sensor 1 High Temperature Sensing Circuit

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 P1E46 Code

1. What does the OBDII code P1E46 indicate?

The code P1E46 indicates that the 14 Volt Power Module Temperature Sensor 1 has detected a high temperature in the sensing circuit, which could signify an overheating issue within the power module system.

2. What are the common symptoms of code P1E46?

Symptoms may include a decrease in vehicle performance, potential overheating warnings on the dashboard, unexpected power loss, or in some cases, no noticeable symptoms at all apart from the illuminated check engine light.

3. What could cause the OBDII code P1E46 to be triggered?

Causes for this code might involve a faulty temperature sensor, wiring issues like shorts or disconnections, problems within the power module itself, or environmental factors causing the module to overheat.

4. How can I diagnose the problem leading to code P1E46?

Diagnosis should start with scanning the vehicle with an OBDII scanner, checking the wiring and connectors for damage, and inspecting the temperature sensor and power module for faults or overheating signs. Further checks might include monitoring the temperature readings through live data to see if they exceed normal ranges.

5. What are the potential repairs for fixing code P1E46?

Repairs might involve replacing the faulty temperature sensor, repairing or replacing damaged wiring, ensuring proper cooling of the power module, or replacing the power module itself if it's found to be defective.

6. Can I drive my vehicle with the OBDII code P1E46 showing?

While you might be able to drive the vehicle, it's not advised to do so without addressing the issue, as it involves the power system and could potentially lead to more serious problems like vehicle stalling or damage to sensitive electronic components.

7. Is code P1E46 a common issue in electric or hybrid vehicles?

Yes, code P1E46 is more commonly associated with hybrid or electric vehicles as it relates to the power module system, which is integral to their operation.

8. What tools are necessary to diagnose and repair code P1E46?

Useful tools include an OBDII scanner capable of reading manufacturer-specific codes, a multimeter for checking voltages and resistances, and standard hand tools for accessing and replacing components.