LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Jeep >> 2007 >> Wrangler Rubicon, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0203 To P0420 >> P0404-EGR Position Sensor Rationality Open >> Possible Causes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Possible Causes

Possible Causes 
EXCESSIVE RESISTANCE IN THE (K34) EGR SENSOR SIGNAL CIRCUIT
EXCESSIVE RESISTANCE IN THE (F856) 5 VOLT SUPPLY CIRCUIT
EXCESSIVE RESISTANCE IN THE (K35) EGR SOLENOID CONTROL CIRCUIT
(K900) SENSOR GROUND CIRCUIT OPEN
(Z906) EGR SOLENOID GROUND CIRCUIT OPEN
EGR SOLENOID ASSEMBLY
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

scientia non olet · About LEMON Manuals