DTC Description

When ECM detects short to open in OCV control circuit, ECM sets DTC P0078.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

•

Circuit continuity check, low

1.

Poor connection

2.

Short to battery in control circuit

3.

OCV(Exhaust)

Enable Conditions

•

-

Threshold Value

•

Short circuit to open

Diagnostic Time

•

Continuous

MIL ON Condition

•

3 driving cycle

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