P0474: Exhaust Pressure Sensor Intermittent - Causes, Fixes & Cost [2026]
What is P0474? P0474 is the intermittent version of the EBP sensor faults. The signal goes out of range briefly during driving and returns. Usually traces to a corroded connector, a partially clogged sensor tube, or a wire flexing against a bracket.
🎯 Top 3 Causes Ranked by Probability
52%
#1 - Most Likely
Loose or Corroded Connector
Vibration causes momentary signal loss at the EBP sensor connector. Cleaning the pins and re-seating often fixes it.
🔨 Part
$5-$40
👨🔧 Labor
$30-$120
⚡ DIY
Easy
28%
#2 - Check First
Partially Clogged Sensor Tube
Soot builds up enough to occasionally restrict flow during transients, setting the rationality check off briefly.
🔨 Part
$0-$30
👨🔧 Labor
$60-$180
⚡ DIY
Easy
20%
#3 - Less Common
Failing Sensor
The sensor element is on the way out and reads erratically. Eventually it will set P0470 or P0472/P0473.
🔨 Part
$80-$280
👨🔧 Labor
$60-$200
⚡ DIY
Easy
🔧 Step-by-Step Diagnosis
- Unplug, inspect, and clean the EBP sensor connector. Dielectric grease helps prevent return.
- Wiggle-test the harness with the engine running while watching live EBP - flicks in the value reveal the bad spot.
- Remove the sensor tube and clean it with carb cleaner and compressed air.
- If symptoms persist after cleaning, replace the sensor.
- Clear the code and drive a full warm-up cycle to verify.
🚗 Most Affected Vehicles
🚫 Is It Safe to Drive with P0474?
Yes. The code may set occasionally without symptoms, but fix it before the failure becomes permanent.
❓ Frequently Asked Questions
Is P0474 a serious code?
Not by itself. It is a warning that a permanent EBP fault is on the way. Fix at your next service visit.
How do I find an intermittent EBP fault?
Watch live EBP voltage while wiggling the connector and harness. Any sudden spike or drop pinpoints the loose spot.
Can rain or moisture set P0474?
Yes. A connector that lost its seal will let moisture in during rain or car washes, briefly shorting the signal.
Should I replace the EBP sensor preemptively?
If you have already cleaned the connector and tube and the code is still returning, replacing the sensor is the next step.
Will P0474 fail emissions?
Yes if it is active at test time. If the code is stored as pending or history only, your inspector should still see no MIL on, which usually passes.