Triumph Rocket 3 GT 2021 - Page 680

652
Oxygen Sensor Heater
Fault
Code
Possible cause
Action
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
Pinpoint Tests
Test
Result
Action
1
Check cable and terminal integrity.
- Oxygen sensor pin 3
- Oxygen sensor pin 4
- EMS relay pin 5
- Engine ECM pin C22
OK
Disconnect oxygen sensor
and proceed to test 2
Faulty
Rectify fault, proceed to
test 5
2
Check cable for short circuit:
- Engine ECM pin C22 to ground
OK
Proceed to test 3
Short
Circuit
Locate and rectify wiring
fault, proceed to test 5
3
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 4
OK
Proceed to test 4
Open
Circuit
Locate and rectify wiring
fault, proceed to test 5
4
Check sensor resistance:
- Oxygen sensor pin 3 to 4
13 to 18.5
Ohms
Proceed to test 5
Faulty
Rectify fault, proceed to
test 5
5
Reconnect harness, clear fault code
and run engine to verify fault cleared.
OK
Action complete - quit test
Fault still
present
Contact Triumph service