P1E45 GMC Code - 14 Volt Power Module Temperature Sensors 1-2 Not Plausible
Quick Answer
The 14 V power module, also referred to as the accessory DC power control module, constantly monitors system temperature to protect against over-heat 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
- P1E45 GMC indicates 14 Volt Power Module Temperature Sensors 1-2 Not Plausible.
- 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.
Code P1E45 GMC Description
What are the Possible Causes of the DTC P1E45 GMC?
- 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 P1E45 GMC?
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 P1E45 GMC 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 P1E45 GMC code?
Need more information on how to fix the P1E45 GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1E45 GMC code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1E45 GMC Code
1. What does the OBDII code P1E45 mean on a GMC vehicle?
Code P1E45 indicates an issue with the 14 Volt Power Module, where temperature sensors 1 and 2 are providing readings that are not plausible or consistent with one another.
2. What are the common symptoms of GMC code P1E45?
Symptoms may include an illuminated check engine light, reduced charging system performance, poor fuel efficiency, or issues with the vehicle's electrical system.
3. What causes the P1E45 code to trigger?
This code can be caused by faulty temperature sensors, wiring issues, a defective 14 Volt Power Module, or software/communication errors in the vehicle's control modules.
4. Can I continue driving with a P1E45 code?
While the vehicle may still be drivable, ignoring this code can lead to further damage to the 14 Volt Power Module or other electrical components. It’s best to address the issue promptly.
5. How is the P1E45 code diagnosed?
Technicians diagnose this code by using a scan tool to check for additional codes, inspecting the wiring and connections, testing the temperature sensors, and verifying the functionality of the 14 Volt Power Module.
6. What repairs can resolve the P1E45 code on a GMC?
Repairs may include replacing faulty temperature sensors, repairing or replacing damaged wiring, updating the vehicle’s software, or replacing the 14 Volt Power Module if it is defective.
7. How much does it cost to fix the P1E45 code?
Repair costs vary depending on the specific issue, but sensor replacement typically costs $150–$300, while replacing the 14 Volt Power Module can cost $500–$1,000 or more.
8. Can a weak battery cause the P1E45 code?
While a weak battery is not a direct cause of this code, it can contribute to electrical system malfunctions that exacerbate the issue. A battery test is recommended during diagnosis.
9. Is the P1E45 code specific to GMC vehicles?
Yes, this code is specific to GMC vehicles and relates to the 14 Volt Power Module system used in certain GMC models.
10. Do I need to update my vehicle’s software to fix the P1E45 code?
In some cases, updating the vehicle’s control module software may resolve communication errors or incorrect readings, so it is worth considering during diagnosis.
Discuss the causes and fixes for P1E45 GMC OBDII Code
Code P1E45 GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
