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Home >> Jeep >> 2009 >> Compass Limited, ED3, FWD, Automatic CVT >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P2127 To P2308 (Gas) >> P2257-Secondary Air Injection System Control 1 Circuit Low >> Possible Causes
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Possible Causes

Possible Causes 
(F343) FUSED ASD/MAIN RELAY OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE
(K644) SECONDARY AIR PUMP CONTROL CIRCUIT SHORTED TO GROUND
(K644) SECONDARY AIR PUMP CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
SECONDARY AIR PUMP RELAY
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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