The outside air temperature reading is implausible. Mostly a comfort and economy nuisance, but on some cars it upsets fuelling and auto climate control.
P0071 — also written POO71, P 0071, 0071 — is the OBD-II code for ambient air temperature sensor range/performance. Same code, same fix: this page covers every spelling of it.
P0071 is a sensors fault code, typically costing £30–£160 to put right in a UK garage.
What causes P0071?
- Failed ambient sensor behind the front bumper
- Sensor caked in road salt and grime
- Wiring damage from a minor front-end knock
How P0071 is fixed
- Clean or replace the ambient sensor
- Repair wiring behind the bumper
P0071 repair cost in the UK
Most P0071 repairs land between £30–£160 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 P0071?
Yes.
Urgency: low.