P1477 CHRYSLER – Too Much Secondary Air Injected

P1477 CHRYSLER Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1477 CHRYSLER Possible Causes

Blockage in system,Defective Oxygen Sensor

P1477 CHRYSLER Description

With the engine warm-up completed, engine running in closed loop, the Powertrain Control Module (PCM) detects that too much secondary air was injected during the test period. Check for loose, broken or miss-routed vacuum hoses. Refer to Monitor Test, code repair chart to test this code.