Kia Niro: Emission Control System / Troubleshooting

Troubleshooting
Symptom
Suspected area
Engine will not start or hard to start
Vapor hose damaged or disconnected
Engine struggles to start
Malfunction of the Purge Control Solenoid Valve
Rough idle or engine stalls
Vapor hose damaged or disconnected
Malfunction of the PCV valve
Rough idle
Malfunction of the Evaporative Emission Control System
Excessive oil consumption
Positive crankcase ventilation line clogged

Schematic diagrams
Schematic Diagram ...

Crankcase Emission Control System
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Other information:

Kia Niro 2017 (DE HEV) Service Manual: Power Relay Assembly (PRA) Description and operation
Description The Power Relay Assembly (PRA) consists of the positive and negative main relays, pre-charge relay, pre-charge resistor and battery current sensor. It is located inside the battery pack assembly and controls the high voltage power circuit between the high voltage batte ...

Kia Niro 2017 (DE HEV) Service Manual: Pre-Charge Resistor Description and operation
Description Built into the Power Relay Assembly (PRA), the Pre-Charge Resistor protects the high voltage circuit by limiting the current while the inverter capacitor is being charged. 1. High Voltage Power Terminal (-) 2. High Voltage Power Terminal (+) 3. ...

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