AutoCodes – Generic – P2538

P2538 Code - Ignition Switch Accessory Position Circuit High

Quick Answer

The Powertrain Control Module (PCM) monitors the Ignition Switch Accessory Position signal. Common causes include Faulty Ignition Switch, Ignition Switch harness is open or shorted, Ignition 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: P2538 indicates Ignition Switch Accessory Position Circuit High.
Common causes: Common causes include Faulty Ignition Switch, Ignition Switch harness is open or shorted, Ignition 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 5,693

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 Jan 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P2538 Description

The Powertrain Control Module (PCM) monitors the Ignition Switch Accessory Position signal. The PCM sets the OBDII code when the Ignition Switch Accessory Position signal is out of factory specifications.

OBDII Code P2538 - Ignition Switch Accessory Position Circuit High - AutoCodes.com — P2538 Code - Ignition Switch Accessory Position Circuit High

What does this mean?

What are the Possible Causes of the DTC P2538?

Faulty Ignition Switch
Ignition Switch harness is open or shorted
Ignition Switch circuit poor electrical connection

How to Fix the DTC P2538?

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 P2538 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 P2538 code?

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Information for Specific Makes

P2538 Dodge — Ignition Switch Accessory Position Circuit High

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.