P2535 Buick 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 Buick 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.
Code P2535 Buick Description
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.
What are the Possible Causes of the DTC P2535 Buick?
- 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 Buick?
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 Buick 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.
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Frequently Asked Questions about P2535 Buick Code
1. What does the OBDII code P2535 mean for a Buick?
P2535 indicates an "Ignition On/Start Switch Circuit High Voltage," meaning the powertrain control module (PCM) has detected a high voltage issue in the ignition switch circuit.
2. What are common symptoms of the P2535 code in a Buick?
Symptoms may include difficulty starting the vehicle, intermittent stalling, the engine not cranking, or the check engine light being illuminated.
3. What causes the P2535 code to appear on a Buick?
Potential causes include a faulty ignition switch, damaged or corroded wiring, a malfunctioning starter relay, or a defective PCM.
4. Can I drive my Buick with a P2535 code?
It is not recommended to drive with this code, as it can result in starting issues or sudden stalling, which could be dangerous.
5. How is the P2535 code diagnosed in a Buick?
A technician will inspect the ignition switch, wiring, and connectors for damage or corrosion, then use a multimeter to check voltage levels in the circuit.
6. How can I fix the P2535 code on my Buick?
Repairs may include replacing the ignition switch, repairing damaged wiring or connectors, or replacing the starter relay if it has failed.
7. How much does it cost to repair a P2535 code on a Buick?
Repair costs vary but may range from $150 to $400 depending on the specific issue, with ignition switch replacement being one of the more common repairs.
8. Can a weak battery cause the P2535 code on a Buick?
While a weak battery is unlikely to cause this code directly, issues with power distribution from the battery could potentially affect the circuit.
9. What tools are needed to troubleshoot the P2535 code on a Buick?
Tools may include an OBDII scanner, a multimeter, and basic hand tools to inspect and repair wiring or replace components.
10. Will clearing the P2535 code fix the problem on my Buick?
Clearing the code may turn off the check engine light temporarily, but the issue will likely return unless the underlying problem is resolved.
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