The flex-fuel or fuel composition sensor circuit has failed. Uncommon on UK-market cars but appears on imports and some E85-capable models.
P0176 — also written PO176, P 0176, 0176 — is the OBD-II code for fuel composition sensor circuit. Same code, same fix: this page covers every spelling of it.
P0176 is a fuel & air fault code, typically costing £120–£450 to put right in a UK garage.
What causes P0176?
- Failed composition sensor
- Corroded connector under the car
- Water ingress in the loom
How P0176 is fixed
- Replace the sensor
- Repair and reseal the connector
P0176 repair cost in the UK
Most P0176 repairs land between £120–£450 including parts and labour. The spread is wide because the cheap fix (a sensor, a hose, a leak) and the expensive fix (a major component) throw the same code — which is why a proper diagnosis before parts are bought saves the most money.
Can you drive with P0176?
Yes, though fuelling may be conservative.
Urgency: medium.