Understanding Sensor Codes and Troubleshooting

What type of engine is Simon referring to in his question?

• KCB engine, C14

• KCB engine, C12

• KCB engine, C15

• KCB engine, C13

Where is the atmospheric pressure sensor located on a C13 engine?

• On the intake side

• On the front structure

• In the oil pan

• Near the exhaust

What does a voltage high code indicate in a sensor circuit?

• A high pressure reading

• A faulty ECM

• An open circuit

• A short circuit

What is the primary difference between voltage high and voltage low codes?

• Voltage high indicates high pressure, voltage low indicates low pressure

• Voltage high indicates an open, voltage low indicates a short

• Voltage high indicates a faulty sensor, voltage low indicates a faulty ECM

• Voltage high indicates a short, voltage low indicates an open

What is the role of pull-up voltage in sensor circuits?

• To measure current

• To ground the sensor

• To power the sensor

• To check if the signal is in range

How do current high and low codes differ from voltage codes?

• They are used for sensors

• They are used for solenoids

• They indicate pressure issues

• They are not used in diagnostics

What does a current low code signify in a solenoid circuit?

• A faulty solenoid

• A high current flow

• A short circuit

• An open circuit

What is a common cause of voltage high codes in Cat engines?

• Faulty ECM

• Open circuit in the sensor

• Short circuit in the wiring

• High pressure reading

What is a simple troubleshooting step for a voltage high fault?

• Replace the sensor

• Check the oil pan

• Replace the ECM

• Check the sensor plug

What was the actual issue found in Simon's case?

• Short circuit

• Faulty ECM

• High pressure reading

• Bad sensor plug