Vauxhall Workshop Service and Repair Manuals

Trouble Code

Information Sensor

Cause of Fault

Remedy in

F0: DATA LIST

No.

Trouble Code Storage when...

121

O2 SENSOR 2

LEAN EXHAUST

46, 48, 52, 54, 56

·   Oxygen sensor integrator (internal control unit value for evaluation of

     oxygen sensor control) has exceeded upper limit of 1.2

     (mixture constantly too lean)

Thereafter for at least 15 s:

·   Coolant temperature less than 107 °C / 225 °F

·   Intake air temperature lower than 30 °C / 86 °F

·   Trouble codes 73 and 74 not recognized

·   Engine load signal greater than 0.8 ms (X 25 XE) or 0.9 ms (X 30 XE)