P0475 — Exhaust Pressure Sensor Intermittent
Drive with caution — fix soon.
What P0475 means
This code means the engine computer detected an intermittent or erratic signal from the exhaust pressure sensor, so the reading drops out occasionally rather than staying steady. It usually points to loose or corroded wiring, a flaky connector, or a sensor that's beginning to fail. It's a moderate emissions and drivability code that's typically fixable by repairing the circuit or replacing the sensor.
Common symptoms
- Check engine light comes on, sometimes intermittently
- Occasional reduced power or brief limp mode
- Intermittent rough idle or hesitation
- Occasional exhaust smoke (especially on diesels)
- Inconsistent fuel economy
Common causes
- Loose, corroded, or chafed wiring at the sensor
- Intermittent or poor electrical connector contact
- Failing exhaust pressure sensor
- Partially clogged or loose sensor pressure tubes
- Vibration causing momentary circuit breaks
Typical repair cost
$150 – $450
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0475 code?
Usually yes, but don't ignore it. The intermittent signal can briefly affect EGR and power, and the fault may worsen over time, so get it diagnosed within a week or so.
How much does it cost to fix a P0475 code?
Most repairs run $150 to $450. Repairing a connector or wiring is cheaper, but diagnosing an intermittent fault takes time, and replacing the sensor adds parts cost.
Is a P0475 code serious?
It's moderate. The car usually stays drivable, but intermittent faults can be unpredictable and affect emissions, and on diesels they tie into the particulate filter, so it's worth addressing.
Why is a P0475 code hard to fix?
Because the problem comes and goes, the fault may not show up when a mechanic tests it. Loose wiring and connectors are common causes, so techs often wiggle-test the harness to recreate the dropout.