Is It Safe to Drive With a P0520 Code?
Common Symptoms of a P0520 Fault
Oil pressure warning light
EML on
Possible engine knock or ticking
Engine may enter protection mode
Possible Causes of P0520
A P0520 code can be triggered by faults across several systems. Identifying the exact root cause requires proper diagnostic equipment and live data — not just reading the code.
Oil Pressure Sensor Wiring Fault
Wiring or connector to the oil pressure sensor is damaged.
Oil Pressure Sensor Failure
The sensor itself has failed — may not indicate actual oil pressure.
Low Oil Level
Oil level too low — check immediately before assuming sensor fault.
ECU Input Fault
ECU circuit reading the oil pressure sensor.
Why we don't list the exact part: A P0520 code tells you what's happening but not why. Replacing parts without diagnosis is the most common way drivers waste money. A proper diagnosis identifies the specific cause first.
🔍 Get Your Exact Diagnosis
Find Out Exactly What's
Causing Your P0520 — £1.99
Causing Your P0520 — £1.99
MotorLoom cross-references your P0520 against known fault patterns for your exact make, model and mileage — giving you the most likely specific cause, UK repair cost and MOT risk instantly.
Most likely specific cause for your exact vehicle
UK repair cost estimate (parts + labour)
MOT pass/fail risk assessment
Whether it's safe to continue driving
Unlock My Full Diagnosis — £1.99 →
One-time £1.99 · Instant results · No subscription
£60
£1.99
P0520 and Your MOT
A stored P0520 fault code will cause your car to fail its MOT. The engine management light will be illuminated during the test — an automatic failure. Get the fault diagnosed and repaired, then have the code cleared before booking your test.