BMW fault code 273B
Engine electronics
In the engine electronics, code 273B means different things depending on the version of the module in the car. Find your car below; the app shows the right one for yours.
DME: Tank vent valve, mechanical
Module versions: Engine electronics (MED17_2), Engine electronics (MED17_2N), Engine electronics (MEV17_2), Engine electronics (MEV17_2N)
Which BMWs have these versions depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
DME: Oxygen sensor, oscillation check behind cat., bank 2
Module versions: Engine electronics (MS_S65_2), Engine electronics (MS_S65_3)
Which BMWs have these versions depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
CDKDVPWL - Throttle valve controller PWM long test
Module version: Engine electronics (ME9K_NG4)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
273B Catalytic converter conversion bank 1 via nitrogen oxide sensor
Module version: Engine electronics (MS450DS0)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
DME: Oxygen sensor behind cat., bank 2, vibration check
Module version: Engine electronics (MS_S65)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
DME: Oxygen sensor vibration check behind catalytic converter, bank 2
Module version: Engine electronics (MSS60)
Which BMWs have this version depends on the engine and equipment, so we don't list them here; AutoLingo for BMW reads which version your car has.
Reading and clearing it
Fault code 273B is a BMW code, stored in the car's engine electronics, not a generic OBD2 code (P0xxx): a generic OBD2 reader only reaches the engine's emissions faults, so it won't show it. AutoLingo for BMW reads it with BMW's own diagnostic protocols, in plain English, with the details the module stored about it, and clears it after a repair. If a fault comes right back after it's cleared, the problem is still there.
The engine electronics is on: 3 Series (E46), Z8 (E52), X5 (E53), 5 Series (E60), 5 Series (E61), 6 Series (E63), 6 Series (E64), 7 Series (E65), 7 Series (E66), 7 Series (E67), X5 (E70), X6 (E71), X6 (E72), 1 Series (E81), 1 Series (E82), X3 (E83), X1 (E84), Z4 (E85), Z4 (E86), 1 Series (E87), 1 Series (E88), Z4 (E89), 3 Series (E90), 3 Series (E91), 3 Series (E92), 3 Series (E93)
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