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Home >> Jeep >> 2010 >> Compass Limited, EDG, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Gas - DTCS P0703 To P2016 >> P1128-Closed Loop Fueling Not Achieved - Bank 1 >> Possible Causes

Possible Causes

Possible Causes 
FUEL DELIVERY SYSTEM
ECT SENSOR, WIRING, OR CONNECTORS
MAP SENSOR, WIRING, OR CONNECTORS
O2 SENSOR, WIRING, OR CONNECTORS
ENGINE MECHANICAL SYSTEM
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See  DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure  . 

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