P0053

Oxygen sensor heater resistance - bank 1 sensor 1

View and note 'freeze-frame' data if available.

Disconnect engine ECM and proceed to pinpoint test 1:

P0134

Oxygen sensor circuit no activity detected - bank 1 sensor 1

P0171

System too lean - bank 1

P0172

System too rich - bank 1

1

Check cable and terminal integrity:

-Oxygen sensor pin 3

-Oxygen sensor pin 4

-EMS relay pin B05

-Engine ECM pin C22

OK

Disconnect oxygen sensor and proceed to test 2

Faulty

Rectify fault, proceed to test 5

2

Check sensor resistance:

- Oxygen sensor pin 3 to 4

13 to 18.5 Ohms

Proceed to test 3

Faulty

Rectify fault, proceed to test 5

3

Check cable for short circuit:

- Engine ECM pin C22 to ground

OK

Proceed to test 4

Short circuit

Locate and rectify wiring fault, proceed to test 5

4

Check cable continuity:

-Engine ECM pin C22 to oxygen sensor pin 3

-Engine ECM pin A08 to oxygen sensor pin 4

-Engine ECM pin A21 to oxygen sensor pin 1

OK

Proceed to test 5

Open circuit

Locate and rectify wiring fault, proceed to test 5

5

Reconnect harness, clear fault code and run engine.

Check adaption status.

OK

Action complete - quit test

Fault still present

Contact Triumph service