AutoCodes – GMC – P250A GMC

P250A GMC Code - Engine Oil Level Switch Circuit

Quick Answer

The engine oil level sensor/switch is normally closed with a proper engine oil level. Common causes include Faulty Engine Oil Level Switch, Engine Oil Level Switch harness is open or shorted, Engine Oil Level Switch 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: P250A GMC indicates Engine Oil Level Switch Circuit.
Common causes: Common causes include Faulty Engine Oil Level Switch, Engine Oil Level Switch harness is open or shorted, Engine Oil Level Switch 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 355

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 Sep 21, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P250A GMC Description

The engine oil level sensor/switch is normally closed with a proper engine oil level. The switch opens when the engine oil level drops below a calibrated level. The Engine Control Module (ECM) monitors the engine oil level signal circuit when the ignition is ON, and the engine is OFF. With the switch in the closed position, the ECM detects a low voltage on the signal circuit. With the switch in the open position, the ECM detects a high voltage on the signal circuit. When high voltage is detected on the signal circuit, the ECM will send a serial data message to the Instrument Panel Cluster (IPC). The IPC will then display a message on the Driver Information Center (DIC) or illuminate a low engine oil level lamp.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects a high voltage on the signal circuit for three consecutive ignition cycles, followed by an ignition OFF event from 15 minutes to greater than 50 minutes, depending on engine oil temperatures.

OBDII Code P250A GMC - Engine Oil Level Switch Circuit - AutoCodes.com — P250A GMC Code - Engine Oil Level Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P250A GMC?

Faulty Engine Oil Level Switch
Engine Oil Level Switch harness is open or shorted
Engine Oil Level Switch circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P250A 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 does this mean?

Code Tech Notes

Low Engine Oil Level Message Lamp (With Diesel Engine) or Engine Oil Level Switch (With Gasoline Engine)

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P250A 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 P250A GMC code?

Need more information on how to fix the P250A GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P250A GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P250A 2014 GMC Sierra — Engine Oil Level Switch Circuit
P250A 2015 GMC Sierra — Engine Oil Level Switch Circuit
P250A 2016 GMC Sierra — Engine Oil Level Switch Circuit
P250A 2017 GMC Sierra — Engine Oil Level Switch Circuit
P250A 2018 GMC Sierra — Engine Oil Level Switch 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 P250A GMC Code

1. What are the common symptoms of OBDII code P250A GMC?

The common symptoms of OBDII code P250A GMC include illuminated Check Engine Light, low engine oil pressure warning, and potential engine performance issues.

2. What causes the OBDII code P250A GMC to trigger?

The OBDII code P250A GMC is triggered when there is a malfunction in the engine oil level switch circuit, which may be caused by a faulty oil level sensor, wiring issues, or a problem with the engine control module.

3. How serious is the OBDII code P250A GMC?

The OBDII code P250A GMC should be addressed promptly, as it relates to the engine oil level switch circuit. Ignoring this code could lead to potential engine damage due to incorrect oil level readings.

4. Can I continue driving with OBDII code P250A GMC?

It is not recommended to continue driving with the OBDII code P250A GMC, as it can affect engine performance and potentially lead to engine damage. It is best to address the issue as soon as possible.

5. How can I diagnose the OBDII code P250A GMC?

Diagnosing the OBDII code P250A GMC involves using a scan tool to retrieve the code, checking the engine oil level, inspecting the oil level sensor and its wiring for any faults, and testing the engine control module.

6. What is the typical repair for OBDII code P250A GMC?

The typical repair for OBDII code P250A GMC involves replacing the faulty oil level sensor, repairing any damaged wiring, and resetting the engine control module to clear the code.

7. Can a DIY enthusiast repair OBDII code P250A GMC?

While some DIY enthusiasts may have the skills to diagnose and repair OBDII code P250A GMC, it is recommended to seek professional help, especially when dealing with sensitive engine components like the oil level sensor.

8. How much does it cost to repair OBDII code P250A GMC?

The cost to repair OBDII code P250A GMC can vary depending on the cause of the issue, the need for parts replacement, and labor costs. It is advisable to get a few quotes from different mechanics to compare prices.

9. Is there a way to prevent OBDII code P250A GMC from recurring?

Regular maintenance, including checking the engine oil level and quality, can help prevent the recurrence of OBDII code P250A GMC. Ensuring the oil level sensor and wiring are in good condition can also help prevent future issues.

10. Can OBDII code P250A GMC affect vehicle safety?

While OBDII code P250A GMC may not directly impact vehicle safety, ignoring this code can lead to engine damage and potential breakdowns, which can compromise safety on the road. It is essential to address this code promptly.