2017-10-10
Decreased fuel efficiency
Illuminated check engine light
Rough idling or stalling
Failed emissions test
Failed oxygen sensor
Malfunctioning electrical connections in the circuit
Damaged or corroded wiring
Failed engine control module (ECM)
Oxygen Sensor: This is one of the parts that fails very commonly. It measures the amount of oxygen to ensure proper combustion. Problems in the Oxygen Sensor lead to poor fuel economy
Replace the oxygen sensor
Inspect and repair any damaged wiring or connections
Clean or repair any corroded electrical connections
Replace the engine control module (ECM) if necessary