P1591

DTC P1591
Rough road signal implausible Drive cycle A:Signal out of range - below minimum.

Possible causes by suggested order of priority:
^ Connectors C504, ECM C637 (B).
^ Open circuit - C637/34 (RG) to C504/4 (RG).
^ ABS fault.

Connectors C504, ECM C637 (B).
CONNECTOR
^ Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.

Open Circuit - C637/34 (RG) to C504/4 (RG).
OPEN_CIRCUIT
^ Check resistance > 1M Ohm

ABS Fault.
CHECK THE FOLLOWING:
^ Carry out diagnostic checks on the ABS system.
POSSIBLE FAULTS
^ Faulty ABS ECU or wiring.