Pinpoint Test H: Exhaust BACKPRESSURE Sensor: Description

WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 1996 Ford RV Cutaway, 1996 Ford Pickup, 1996 Ford F-Super Duty, 1996 Ford Econoline, and 1996 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

Exhaust Back Pressure (EBP) sensor is a variable capacitance sensor which, when supplied with a 5-volt reference signal from Powertrain Control Module (PCM), produces a linear analog voltage signal that indicates pressure. EBP sensor's primary function is to measure exhaust back pressure so that PCM can control Exhaust Back Pressure Regulator (EPR) when needed. An EBP signal that is detected out of range (high or low) by PCM will cause engine to ignore EBP signal and disable exhaust back pressure operation. DTC 0470 indicates EBP sensor circuit malfunction. DTC 0471 indicates EBP sensor circuit performance. DTC 0472 indicates EBP sensor circuit low input. DTC 0473 indicates EBP sensor circuit high input. DTC 0478 indicates exhaust pressure control valve high input.

Perform this test when directed here by QUICK TEST . This PINPOINT TEST is intended to diagnose:

Exhaust Back Pressure (EBP) sensor.
Wiring harness circuits; (SIG RTN, VREF and EBP Signal).
Powertrain Control Module (PCM).

Fig 1: Exhaust Back Pressure Sensor Circuit Checks & Connector Terminals (1 Of 2)

Courtesy of FORD MOTOR CO.

Fig 2: Exhaust Back Pressure Sensor Circuit Checks & Connector Terminals (2 Of 2)

Courtesy of FORD MOTOR CO.