Powertrain
generic / SAE
P04E4
Crankcase Ventilation Hose Connection Sensor Circuit Intermittent or Erratic
Same as P04E1 with intermittent or erratic signal. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / E4
Possible causes
- Intermittent contact at connector high
- Connector with intermittent contact under vibration low
- Harness routed against vibrating component low
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 60–250 €
- Estimated time: 0.4–1.2 h
- Component: pcv hose connection sensor
- Component: pcv hose wiring
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012