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Home >> Jeep >> 2018 >> Grand Cherokee Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (3.0L Diesel - DTCS P0627-00 To P1692-00) >> DTC Troubleshooting >> P1690-00-REDUCTANT Injection Valve Circuit Low - Positive Side >> Possible Causes

Possible Causes

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Possible Causes
DEF INJECTOR POSITIVE CIRCUIT SHORTED TO GROUND
DEF INJECTOR
POWERTRAIN CONTROL MODULE

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .