Downstream O2 heater circuit problem.
P0141 — also written PO141, P 0141, 0141 — is the OBD-II code for o2 sensor heater (bank 1 sensor 2). Same code, same fix: this page covers every spelling of it.
This is your post-cat oxygen sensor's internal heater failing, preventing it from 'waking up' quickly on cold starts. It’s an absolute classic on Vauxhall Corsas and older VW Golfs where the heating element just snaps over time.
P0141 is a sensors fault code, typically costing £100–£300 to put right in a UK garage.
What P0141 actually feels like to drive
- Engine management light (EML) staring you in the face on the dash.
- The car feels 100% normal to drive, no loss of power at all.
- A slight dip in MPG over a long period, though barely noticeable.
- Fails the MOT immediately because the MIL/EML lamp is illuminated.
- The light might go out for a day after clearing, but pops back on as soon as you start it from cold.
What causes P0141?
- Heater failure
- Fuse blown
UK vehicles that throw P0141 most often
- Vauxhall Corsa D/E 1.2 & 1.4 (A12XER/A14XER) 2009-2018
- Volkswagen Golf Mk5/Mk6 1.4 & 1.6 FSI 2004-2012
- Ford Fiesta 1.25 Zetec (Sigma engine) 2008-2017
- Honda Civic 1.8 i-VTEC (R18 engine) 2006-2015
- Mini Cooper 1.6 (R56 N12 engine) 2006-2013
- Skoda Fabia 1.2 HTP 3-cylinder 2007-2014
How P0141 is fixed
- Sensor replacement
- Fuse check
The P0141 misdiagnosis that wastes money
Everyone jumps straight to the sensor or, worse, tries to 'clean' it with a blowtorch, which is a total waste of time for a heater circuit fault. I’ve seen lads spend £150 on a new Bosch sensor only to find it still won't clear because they never checked the fuse. On VAG cars and Fords, the O2 heater often shares a fuse with other components like the MAF or crank vent heater. If that fuse is popped, the new sensor won't do a thing. Always check for a 12v feed at the plug before you bin the part.
What a UK garage should charge for P0141
For a standard hatchback, you're looking at £50-£70 for a diagnostic plug-in at an indie. A quality NTK or Denso sensor from a local factor like Euro Car Parts or Dingbro will run you £70-£120—don't buy the £20 eBay specials, they last three weeks. Labour is usually an hour (£60-£90), provided it isn't seized solid in the pipe. Total job usually lands between £180 and £260. A main dealer will likely quote you £450+ for the same 20-minute job.
P0141 repair cost in the UK
Most P0141 repairs land between £100–£300 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.
Bob's tip on P0141
If your local garage says you need a new catalytic converter for a P0141, walk away. This code is purely about the electrical heating element inside the post-cat sensor, not the cat’s efficiency. Insist on a 'continuity test' on the sensor's heater wires (usually the two white ones on a standard four-wire plug). If there’s no resistance (open circuit), the sensor is dead. If the sensor tests fine, tell them to check the wiring loom near the exhaust manifold—I often find melted wires where the loom has come out of its clip and touched the hot pipe.
Can you drive with P0141?
Drivable.
Urgency: low.