Vehicle: 2020 Ford Transit Connect 1.5L Diesel
Title: P2002-00, Replaced Diesel Particulate Filter Pressure Sensor
Complaint:
The customer states the check engine light is on.
Cause:
Connected a scan tool and found code P2002-00 – Particle Filter Bank 1: Malfunction. Performed a road test, used the scan tool to monitor live data and found the exhaust pressure differential sensor signal parameter was above specifications. At idle, backprobed the exhaust pressure differential sensor and monitored the sensor signal on a lab scope. The exhaust pressure differential sensor signal observed on the lab scope was above specifications. At idle, used a multi-meter to check for the presence of voltage and ground at the exhaust pressure differential sensor and found both were present. Used the multi-meter to check for the presence of a short in the exhaust pressure differential sensor circuits and found no shorts were present. Using the lab scope backprobed into the output signal of the Exhaust Pressure Differential Sensor, disconnected both Exhaust Pressure Differential Sensor hoses, connected hand pump to apply pressure to the sensor, noticed signal started higher than normal and with little pressure applied signal about max range of specification. These test results verified the exhaust pressure differential sensor was faulty.
Correction:
Replaced the diesel particulate filter pressure sensor, cleared codes, performed a road test and verified the vehicle operated properly. The check engine light did not illuminate and no fault codes returned.