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P1155 Oxygen Sensor Bank 2 Sensor 1 fault
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P1490 Nissan - Vacuum Cut Valve Bypass Valve
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P0122 Throttle postion sensor (TPS) switch A circuit low input
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Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
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heat the combustion chamber of a diesel engine to help the combustion process on engine start up.