Bank 1 sensor 2 heater fault on Audi TFSI — sensor wear or heat-damaged connector on longitudinal engines.
Audi P0036 — Bank 1 sensor 2 heater fault on Audi TFSI — sensor wear or heat-damaged connector on longitudinal engines. Typical UK independent garage cost: £110–£360.
What actually causes P0036 on a Audi
A4 B8 2.0 TFSI downstream sensor: heater element wears around 90k miles. 3.0 TFSI has two downstream sensors (one per bank via merged pipe); confirm bank ID before ordering.
Audi engines that log P0036
- 2.0 TFSI EA888 (A4, A5)
- 3.0 TFSI EA837 (S4, S5)
- 1.4 TFSI EA211 (A3)
How we diagnose P0036 on a Audi
- VCDS freeze frame and readiness status
- Confirm Bank 1 vs Bank 2 sensor 2 on V6 platforms
- Heater resistance 3–10Ω cold at sensor
- Bosch OE downstream sensor, readiness reset after fit
The common misdiagnosis to avoid
Assuming P0036 means cat replacement — it doesn't. Also, fitting a NTK sensor on 3.0 TFSI throws P0140 intermittent within weeks; Bosch OE only.
Audi P0036 repair cost in the UK
Expect £110–£360 including parts and labour at an independent garage. Main-dealer quotes on Audi are usually higher for the same job, and the spread exists because the cheap cause and the expensive cause throw the same code — pay for the diagnosis before you pay for parts.
Bob's workshop tip
A4 B8 2.0 TFSI — Bosch OE downstream at 90k+ miles is a fair-weather replacement. Don't buy cheap.
Codes usually seen alongside P0036 on Audi
- P0037
- P0141
- P0420
Symptoms drivers report with P0036
- Engine warning light within a mile of cold start
- No drivability issues
- Slight MPG drop
- Possible MOT emissions warning
- Code persists after clearing within one drive cycle
Repairs that clear P0036
- Replace sensor
- Inspect wiring
For the generic, all-makes explanation of this code — meaning, every known cause and UK cost bands — see our P0036 guide.