DTC Advanced Diagnostics: P2232
DTC P2232:Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2)) Circuit Out of Range High

General Description

The powertrain control module (PCM) monitors the secondary heated oxygen sensor (secondary HO2S (sensor 2)) circuit for electrical malfunctions. The described circuit check will detect short circuit to ground, short circuit to power, and open circuit failure modes. If the output voltage of the secondary HO2S (sensor 2) difference between actual and last sensor voltage is a specified value for a specified time, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
0.1 second or more
DTC Type
Two drive cycles, MIL on

Enable Conditions
Condition
Minimum
Maximum
Elapsed time after moisture completely evaporated from exhaust pipe
10 seconds
–
12 volt battery voltage [Battery]
10.7 V
–
[ ]: HDS Parameter

Malfunction Threshold
The output voltage of the secondary HO2S (sensor 2) difference between actual and last sensor voltage is greater than 2 V at least 4 times of heater switch-off event.

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
Secondary HO2S (sensor 2) SO2HT line short to secondary HO2S (sensor 2) SO2 line

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.