The Quick Answer above is the generic definition. What follows is what is documented for the Volkswagen models that log P0502, checked against manufacturer data and owner reports.
DTC/P0502·Volkswagen
P0502 on Volkswagen: Causes, Symptoms and Fix Cost
Quick Answer
Moderate SeverityNot safe to driveVolkswagen
P0502 on a Volkswagen means the ECU is detecting a voltage on the vehicle speed sensor circuit that is lower than expected, typically because the signal wire is shorted to ground, the sensor has failed open, or the connector has lost contact. On vehicles that use the ABS wheel speed sensors as the primary speed input, P0502 usually accompanies an ABS wheel speed code.
Repair cost on Volkswagen€60 - €650
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Volkswagen Golf
2003-2024Mk5 and Mk6 Golf are prone to rear ABS sensor harness chafing along the trailing arm. Once the insulation rubs through, the signal wire shorts to body metal and P0502 sets immediately. Replacing the wiring sleeve and rerouting the harness is the proper repair.
What causes P0502 on a Volkswagen?
Beyond the generic causes listed on the main P0502 page, these are the documented Volkswagen-specific patterns:
Volkswagen GolfRear ABS sensor wire chafed through to ground on Mk5/Mk6
Volkswagen GolfConnector pin push-out at the front sensor after suspension work
How to diagnose P0502 on a Volkswagen with OBD2
Follow these steps to pinpoint the root cause of P0502:
- Read all stored codes. Companion ABS wheel speed codes (C-codes) usually point directly to the failed circuit
- Locate the suspect sensor and inspect the connector for water, corrosion, and damaged pins. Reseat the connector and clear the code to see if it returns
- With ignition off, measure resistance from the sensor signal pin to chassis ground. A near-zero reading confirms a short to ground in the wiring or the sensor
- Backprobe the sensor connector with the engine running and the wheels spinning. A Hall-effect sensor should switch between roughly 0 V and 5 V; a magnetic sensor should produce a small AC waveform that grows with speed
- If the wiring and sensor are healthy, inspect the reluctor ring for missing teeth, cracks, or a sheared press fit
How much does P0502 cost to fix on a Volkswagen? (EUR)
Estimated repair costs for P0502 in EUR, compiled across makes. Expect Volkswagen parts and labour towards the upper end of each range.
Prices estimated as of March 2026. Costs vary by region, vehicle, and shop.
Related codes that often appear with P0502 on Volkswagen
These codes commonly cluster with P0502 on Volkswagen vehicles:
Looking for the full P0502 reference (all makes, full diagnosis flow, complete repair cost matrix)?
See the main P0502 guideSkanyx · Volkswagen
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