P0031

273E - P0031

Information saved in
DME

Fault code
273E - P0031

Fault text
Oxygen sensor final stage diagnosis heater before cat.
converter, Bank 1

Fault description


Condition for fault identification
Test condition:
Designation - Driver info is present
Terminal condition: none
Voltage condition:
none

Condition for fault memory entry
Driver info includes short circuit to ground

Action in service
1. Check plug and wiring harness to pre-catalyst oxygen
sensor forward of Bank 1 catalyst
2. If OK, replace oxygen sensor

Fault effect and breakdown warning
MIL lamp lights up after engine runs 2X

Driver information
Warning light:
No

Service instruction
none