AutoCodes – Saturn – P2535 Saturn

P2535 Saturn Code - Ignition On/Start Switch Circuit High Voltage

Quick Answer

The Body Control Module (BCM) controls the ignition main relay through the control circuit by applying a voltage to the circuit. Common causes include Faulty Ignition On/Start Switch, Ignition On/Start Switch harness is open or shorted, Ignition On/Start 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: P2535 Saturn indicates Ignition On/Start Switch Circuit High Voltage.
Common causes: Common causes include Faulty Ignition On/Start Switch, Ignition On/Start Switch harness is open or shorted, Ignition On/Start 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 1,577

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 Aug 12, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2535 Saturn Description

The Body Control Module (BCM) controls the ignition main relay through the control circuit by applying a voltage to the circuit. The control module samples the system voltage on the Ignition 1 voltage circuit from the ignition main relay every 0.1 s.
The Diagnostic Trouble Code (DTC) will be set when the control module detects greater than 6 V or greater on the ignition voltage circuit, with the ignition turned OFF.

OBDII Code P2535 Saturn - Ignition On/Start Switch Circuit High Voltage - AutoCodes.com — P2535 Saturn Code - Ignition On/Start Switch Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2535 Saturn?

Faulty Ignition On/Start Switch
Ignition On/Start Switch harness is open or shorted
Ignition On/Start Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC P2535 Saturn?

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 P2535 Saturn 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 P2535 Saturn code?

Need more information on how to fix the P2535 Saturn 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 P2535 Saturn Code

1. What does the OBDII code P2535 mean on a Saturn?

P2535 indicates a high voltage issue in the Ignition On/Start Switch Circuit, suggesting a fault in the electrical system related to the ignition switch.

2. What are the common symptoms of code P2535 in a Saturn?

Symptoms may include difficulty starting the vehicle, intermittent stalling, dashboard warning lights, or a no-crank/no-start condition.

3. What causes the P2535 code to appear in a Saturn?

Common causes include a faulty ignition switch, damaged or corroded wiring, a malfunctioning starter relay, or an issue with the ECM/PCM.

4. Can a bad battery cause the P2535 code in a Saturn?

Yes, a weak or failing battery can cause voltage irregularities, potentially triggering this code.

5. How can I diagnose the P2535 code in my Saturn?

Start by inspecting the ignition switch, checking the wiring and connectors for damage or corrosion, and testing the voltage with a multimeter. Also, verify the battery voltage and condition.

6. Is it safe to drive a Saturn with a P2535 code?

Driving with this code can be risky as it may lead to stalling or a no-start condition, leaving you stranded.

7. How do you fix the P2535 code on a Saturn?

Repairs may include replacing the ignition switch, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming the ECM/PCM if needed.

8. How much does it cost to fix the P2535 code in a Saturn?

Costs can range from $50 to $300 depending on whether the issue is with the ignition switch, wiring, or ECM/PCM.

9. Can I clear the P2535 code without fixing the issue?

Clearing the code without addressing the root cause will likely result in the code returning and may worsen the problem over time.

10. Will replacing the ignition switch always fix the P2535 code?

Not necessarily. While the ignition switch is a common culprit, you should verify the wiring, connectors, and ECM/PCM functionality before replacing parts.