OBD-II code · Network
U0698 Lost Communication With Coolant Pump E
The vehicle bus reports loss of communication with smart coolant pump E (electric water pump). Pump speed cannot be commanded; coolant flow falls back to a default duty.
Is it safe to drive with U0698?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyBus wiring open or shorted
- PossibleModule without power or ground
- PossibleModule failed
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
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Coolant Pump E, Vehicle Bus Wiring
Related codes
- U0623Lost Communication With Coolant Pump A
- U0624Lost Communication With Coolant Pump B
- U062FLost Communication With Coolant Pump C
- U0649Lost Communication With Coolant Pump D
- U0699Lost Communication With Coolant Pump F
- U0695Lost Communication With Hybrid/EV Battery Pack Coolant Pump B
- U0696Lost Communication With Particulate Filter Pressure Sensor C
- U0697Lost Communication With Particulate Filter Pressure Sensor D
- U069ALost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 3
- U069BLost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 4
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.