The wideband oxygen sensor's pump cell circuit is open. Fuel control loses its main feedback signal.
P2237 — also written P2237, P 2237, 2237 — is the OBD-II code for o2 sensor positive current control circuit open (bank 1, sensor 1). Same code, same fix: this page covers every spelling of it.
P2237 is a emissions fault code, typically costing £120–£450 to put right in a UK garage.
What causes P2237?
- Failed wideband O2 sensor
- Broken wire or corroded plug
- Sensor damaged during exhaust work
- ECU driver fault
How P2237 is fixed
- Inspect the sensor connector for corrosion and heat damage
- Replace the wideband sensor with the correct part number
- Repair the loom
P2237 repair cost in the UK
Most P2237 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 P2237?
Yes, but expect poor economy and rough running.
Urgency: medium.