H: Exhaust Back Pressure (EBP) Sensor
Introduction
Introduction
1997 PCED OBDII-Diesel | SECTION 5C: Pinpoint Tests |
H: Exhaust Back Pressure (EBP) Sensor Introduction | H: Pinpoint Tests |
The exhaust back pressure (EBP) sensor is a variable capacitance sensor that, when supplied with a 5-volt reference signal from the powertrain control module (PCM), produces a linear analog voltage signal that indicates pressure.
The EBP sensor's primary function is to measure exhaust back pressure so that the PCM can control the exhaust back pressure regulator (EPR) when needed.
An EBP signal that is detected out of range (high or low) by the PCM will cause the engine to ignore the EBP signal and disable exhaust back pressure operation.
After removing connectors always check for damaged pins, corrosion, loose terminals, etc.
P0470 = EBP sensor circuit malfunction
P0471 = EBP sensor circuit performance
P0472 = EBP sensor circuit low input
P0473 = EBP sensor circuit high input
P0478 = Exhaust pressure control valve high input
| kPa | EBP (Volts) |
|---|---|
| 0 | 0 |
| 55.16 | 0.25 |
| 137.9 | 1.45 |
| 344.75 | 4.45 |
| 365.44 | 4.75 |
| 413.7 | 5.00 |
| In Hg | PSI |
|---|---|
| 0 | 0 |
| 16.38 | 8 |
| 40.94 | 20 |
| 102.36 | 50 |
| 108.50 | 53 |
| 122.83 | 60 |
| H: Pinpoint Tests |