Sunday, June 7, 2020

2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts

2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts

none

P0141

2CA8 – P0141

Information saved in

DME

Fault code

2CA8 – P0141

Fault text

Oxygen sensor heating behind catalytic converter, function

Fault description

O2 Sensor Heater Circuit (Bank 1 Sensor 2)

Condition for fault identification

Test condition:

Check internal resistance of O2 sensor to check sensor

heater => If the heater is too weak, the O2 sensor’s internal

resistance rises too high (= sensor too cold)

No fault memories;

Terminal condition: Terminal 15, engine on

Voltage condition:

none

Condition for fault memory entry

Internal resistance R > 12000 Ohm (US) or 15000 Ohm

(ECE)

Action in service

0. Was the temperature drop caused by external factors

(driving into snow pile, ice on O2 sensor?) Thaw sensor,

clear all fault memory, continue driving!

1. Check O2 sensor heater: Contact resistance on plugs and

81

in wiring is excessive (DME – wiring harness – sensor)

2. Check wiring

3. Check O2 sensor plug (water or corrosion in the plug?

Repeatedly disconnect the plug and then re-insert it

FIRMLY)

4. Replace plug and/or wire as indicated

5. Replace the affected downstream (post-cat) O2 sensor

Fault effect and breakdown warning