P2535 2018 GMC Sierra 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 2018 GMC Sierra 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 2018 GMC Sierra 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 2018 GMC Sierra?
- 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 2018 GMC Sierra?
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.
Code Tech Notes
2016-2018 Chevrolet Silverado 1500
2019 Chevrolet Silverado LD
Dead Battery / P1682 P129D P10E4 P2535 / Crank No Start
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2535 2018 GMC Sierra 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 2018 GMC Sierra Code
1. What does the OBDII code P2535 mean for a 2018 GMC Sierra?
P2535 indicates a high voltage issue in the ignition on/start switch circuit, which may affect the vehicle's ability to start or operate properly.
2. What are the common symptoms of code P2535 in a 2018 GMC Sierra?
Symptoms include difficulty starting the vehicle, intermittent stalling, or the check engine light being illuminated.
3. What causes the P2535 code to appear in the GMC Sierra?
Common causes include a faulty ignition switch, damaged wiring or connectors in the ignition circuit, or a failing powertrain control module (PCM).
4. Can a bad battery cause the P2535 code on a GMC Sierra?
While less common, a weak or failing battery can cause voltage irregularities that might trigger this code.
5. How do you diagnose the P2535 code on a 2018 GMC Sierra?
Diagnosis involves checking the ignition switch, inspecting wiring and connectors for damage or corrosion, and testing the voltage within the ignition circuit.
6. Can I drive my GMC Sierra with the P2535 code?
Driving is possible but not recommended, as the issue could lead to starting problems or engine stalling, which may leave you stranded.
7. How is the P2535 code typically fixed on a GMC Sierra?
Repairs may include replacing the ignition switch, repairing damaged wiring, or reprogramming or replacing the PCM if necessary.
8. How much does it cost to fix the P2535 code on a 2018 GMC Sierra?
Repair costs vary but typically range from $100 to $300 for parts and labor, depending on the exact cause of the issue.
9. Can I reset the P2535 code without fixing the problem?
Clearing the code without addressing the issue may temporarily turn off the check engine light, but the problem will likely recur.
10. Is the P2535 code related to the starter in a GMC Sierra?
While not directly related, issues with the ignition circuit could impact the starter’s operation and cause starting problems.
Discuss the causes and fixes for P2535 2018 GMC Sierra OBDII Code
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