DTC Description

When ECM detects short to ground in FPR control circuit, ECM sets DTC P0091.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

•

Signal check

1.

Poor connection

2.

Short to ground in control circuit

3.

FPR

Enable Conditions

•

-

Threshold Value

•

Short circuit to ground

Diagnostic Time

•

Continuous

MIL ON Condition

•

2 driving cycle

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