Diagnostic trouble code (DTC) information ECM-2240

Condition 

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the rear heated oxygen sensors (HO2S) (banks 1 and 2) have been switched.

The diagnostic trouble code (DTC) is diagnosed when the engine has been idling for 10 minutes.

Substitute Value 

• The heated oxygen sensor (HO2S) control is disabled
• Three-way catalytic converter (TWC) diagnostics are disabled.

Possible Source 

• The rear heated oxygen sensors (HO2S) have been installed in the wrong bank
• Both the rear heated oxygen sensors (HO2S) are damaged.

Fault symptom[s] 

• Malfunction indicator lamp (MIL) lit.