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Home >> Dodge and Ram >> 2009 >> Caliber SXT, 2.0 A >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0299 To P0441 >> P0418-Secondary Air Injection System Control Circuit >> Possible Causes

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 SHORTED TO VOLTAGE
(K644) SECONDARY AIR PUMP CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
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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