OBD-II · Engine and powertrain (P)
P0470
Exhaust pressure sensor A circuit fault
What it means
The ECU detects a fault associated with exhaust pressure sensor A or its circuit. Depending on the OEM monitor, diagnosis may include signal plausibility and a blocked sensor port or pressure tube; these checks are not limited to P0471.
Likely causes, most likely first
| No. | Cause |
|---|---|
| 01 | failed exhaust pressure sensor |
| 02 | open or shorted signal wiring |
| 03 | corroded connector terminals |
| 04 | sensor reference voltage or ground fault |
| 05 | blocked or contaminated sensor port or pressure tube, depending on the OEM monitor |
| 06 | ECU input fault |