AutoCodes – Chevrolet – P257E 2014 Chevrolet Silverado

P257E 2014 Chevrolet Silverado Code - Engine Hood Switch Circuit Low Voltage

Quick Answer

The Engine Control Module (ECM) applies 5 V to the hood ajar signal circuit and monitors the voltage to determine the position of the hood. Common causes include Faulty Hood Ajar Switch, Hood Ajar Switch harness is open or shorted, Hood Ajar 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: P257E 2014 Chevrolet Silverado indicates Engine Hood Switch Circuit Low Voltage.
Common causes: Common causes include Faulty Hood Ajar Switch, Hood Ajar Switch harness is open or shorted, Hood Ajar 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 375

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
Cost to Diagnose
FAQs
Comments
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Code P257E 2014 Chevrolet Silverado Description

The Engine Control Module (ECM) applies 5 V to the hood ajar signal circuit and monitors the voltage to determine the position of the hood. The hood ajar switch contains a multiplexed resistor. This resistor will vary the voltage seen by the Engine Control Module by pulling down the applied voltage based on the position of the switch. The Diagnostic Trouble Code (DTC) will be set when the Engine Control Module detects a short to ground in the hood ajar signal input to the Engine Control Module.

OBDII Code P257E 2014 Chevrolet Silverado - Engine Hood Switch Circuit Low Voltage - AutoCodes.com — P257E 2014 Chevrolet Silverado Code - Engine Hood Switch Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P257E 2014 Chevrolet Silverado?

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

How to Fix the DTC P257E 2014 Chevrolet Silverado?

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 P257E 2014 Chevrolet Silverado 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 P257E 2014 Chevrolet Silverado code?

Need more information on how to fix the P257E 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P257E 2014 Chevrolet Silverado Code

1. What does the OBDII code P257E mean on a 2014 Chevrolet Silverado?

P257E indicates an issue with the Engine Hood Switch Circuit, specifically detecting low voltage.

2. What are the common symptoms of the P257E code in a 2014 Silverado?

Typical symptoms include the hood ajar warning light staying on, remote start not functioning, or security system malfunctions.

3. What causes the P257E code to appear?

This code is usually caused by a faulty hood switch, damaged wiring or connectors in the circuit, or a low system voltage issue.

4. Can a bad hood switch trigger the P257E code?

Yes, a malfunctioning or stuck hood switch is one of the most common causes of this code.

5. How can I fix the P257E code on my 2014 Chevrolet Silverado?

Inspect the hood switch and its wiring for damage, clean or replace the switch if necessary, and check for proper voltage in the circuit.

6. Will the P257E code affect my Silverado's performance?

No, this code typically does not affect engine performance, but it may disable the remote start or impact security system functions.

7. How do I test the hood switch to diagnose the P257E code?

Use a multimeter to check for continuity when the hood is open and closed, and verify voltage supply to the switch.

8. Can a drained battery cause the P257E code?

Yes, low system voltage from a weak or drained battery can contribute to this code appearing.

9. Is it safe to drive my Silverado with the P257E code active?

Yes, your vehicle is generally safe to drive, but you may lose features like remote start and could experience security system glitches.

10. How much does it cost to repair the P257E code on a 2014 Chevrolet Silverado?

Repair costs vary, but replacing the hood switch typically costs $50â€“$150, plus labor if done at a shop. Wiring repairs could cost more depending on the extent of the damage.