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Hyundai TSB #19-01-036H
2019 Hyundai Ioniq Hybrid
TSB Document:
Affected Component: ELECTRICAL SYSTEM
- Summary
- Certain vehicles may incur dash warning light(s) On with DTC(s) stored including either of the following DTC: ? U1116 - Lost Communication With Motor Electronics Coolant Pump (C-CAN) ? U1118 - Lost Communication With Hybrid/EV Battery Electronic Coolant Pump (P-CAN) The vehicle may operate in limp home at a reduced power. The above DTC(s) may occur due to coolant leaking into the Electric Water Pump (EWP) Can Case and may have an intermittent electrical connection. This bulletin provides instructions to inspect the vehicle?s EWP assembly. The Can Case of the EWP or the full EWP Assembly will be replaced depending on the EWP inspection result. The EWP?s connector may also need to be replaced with a wiring harness kit if contamination is confirmed. Perform the inspection procedure as outlined on page-7.
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