P2935
ŚredniShort circuit of rear light output circuit to ground. The controller (ECU/BCM) detected incorrect voltage in the rear lamp circuit – short to ground.
OBD-II (EN): Rear Tail Lamp Output Circuit Short to Ground
Code P2935 signals a short circuit of the rear lighting circuit to ground – rear lights may not work properly, posing a road safety risk. The most common causes are a damaged wiring harness, connector corrosion, or a faulty lamp housing. We recommend prompt diagnosis by a mechanic or auto electrician.
Symptoms
Rear position or brake lights may not work or work incorrectly. Possible blown fuses for rear lighting. Malfunction indicator lamp (MIL) or lighting warning light may be active. Possible unexpected battery drain (discharge). In some vehicles, function limitation or error messages on the dashboard.
Possible causes
• Damaged or chafed rear lighting wiring harness causing insulation short to body ground • Corrosion or oxidation of electrical connectors in the rear lamp circuit • Damaged rear lamp housing (water or mechanical damage causing a short) • Faulty bulb or LED rear light module causing internal short • Damaged body control module (BCM) or lighting control module
Affected systems
Does code P2935 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.