Lamp:Amber Reason:Engine misfire has been detected in cylinder number 5. Effect:Possible reduced engine performance. Circuit Description:The exhaust gas pressure sensor is used to measure exhaust gas pressure in the exhaust manifold. This information is used by the Engine Control Module (ECM) to control emissions and Exhaust Gas Recirculation (EGR) valve operation. The ECM provides a 5 volt supply to the exhaust gas pressure sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The exhaust gas pressure sensor provides a signal to the ECM on the exhaust gas pressure sensor signal circuit. This...

Lamp:Amber Reason:Engine misfire has been detected in cylinder number 6. Effect:Possible reduced engine performance. Circuit Description:The exhaust gas pressure sensor is used to measure exhaust gas pressure in the exhaust manifold. This information is used by the Engine Control Module (ECM) to control emissions and Exhaust Gas Recirculation (EGR) valve operation. The ECM provides a 5 volt supply to the exhaust gas pressure sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The exhaust gas pressure sensor provides a signal to the ECM on the exhaust gas pressure sensor signal circuit. This...

Lamp:Amber Reason:The ECM has diagnosed that the engine is experiencing misfire on multiple cylinders. Effect:Possible reduced engine performance. Circuit Description:The exhaust gas pressure sensor is used to measure exhaust gas pressure in the exhaust manifold. This information is used by the Engine Control Module (ECM) to control emissions and Exhaust Gas Recirculation (EGR) valve operation. The ECM provides a 5 volt supply to the exhaust gas pressure sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The exhaust gas pressure sensor provides a signal to the ECM on the exhaust gas pressure...

Lamp:Amber Reason:The diesel exhaust pressure sensor is reading erratic. Effect:Possible reduced engine performance. Circuit Description:The aftertreatment diesel exhaust fluid dosing valve is controlled by the ECM. When the Engine Control Module (ECM) commands DEF dosing, the ECM sends a Pulse-Width Modulated (PWM) signal to the dosing valve, which opens the dosing valve and allows DEF to be sprayed into the exhaust stream. Component Location:The aftertreatment diesel exhaust fluid dosing valve is installed in the exhaust system. It is mounted directly to the aftertreatment decomposition tube, before the Selective Catalytic Reduction (SCR) catalyst. Installation position will vary, based on the aftertreatment...

Lamp:Amber Reason:The diesel exhaust fluid pressure did not decrease below a threshold after a key off. Effect:Possible reduced engine performance. Circuit Description:The diesel exhaust fluid dosing unit lines are responsible for transporting diesel exhaust fluid between the dosing unit, dosing valve, and diesel exhaust fluid tank. Component Location:There are three diesel exhaust fluid lines. One line is between the dosing unit and dosing valve, and the other two lines are between the dosing unit and the diesel exhaust fluid tank. These lines can be partially hidden from view by the SCR system and other vehicle components. Line routing will vary,...