Network
generic / SAE
U064E
Lost Communication With EGR Cooler Bypass Position Sensor Bank 1
The vehicle bus reports loss of communication with smart EGR cooler bypass position sensor on bank 1. EGR cooling switching cannot be verified; emissions strategy may revert to fully cooled mode.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number6 / 4E
Possible causes
- Bus wiring open or shorted high
- Module without power or ground medium
- Module failed medium
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–1000 €
- Estimated time: 0.5–3 h
- Component: egr cooler bypass position sensor bank 1
- Component: vehicle bus wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012