P0642 on 2024 Hyundai Venue — Sensor Reference Voltage "A" Circuit Low
1 vehicles · 1 makes
How to diagnose and fix P0642: most-reported vehicles
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Hyundai Venue · 2024–2024
A sensor inside the EGR valve may have been contaminated with solder flux during supplier manufacturing and can short. Because the EGR valve and crank position sensor share a power circuit, the short can turn on the check-engine light or cause a sudden loss of motive power, which increases the risk of a crash. Applies to: Certain 2024 Hyundai Venue vehicles with the Gamma 1.6L MPI engine built January 12 – March 4, 2024 (2,364 Venues; the recall also covers some 2024 Elantra and Kona). Hyundai campaign 260. Only a Hyundai dealer can confirm whether a specific VIN is included and whether the repair has been done.
How to Fix
Have a Hyundai dealer check the VIN for recall 24V308 (campaign 260). The remedy is replacement of the EGR valve assembly and its gasket at no cost to the owner; Hyundai also offers reimbursement for eligible out-of-pocket repairs of this condition under its plan filed with NHTSA. This is engine-bay electrical and emissions work; no DIY repair or retail part is recommended.
Sources for this issue (2)
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P0642 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0642 mean?
P0642 stands for "Sensor Reference Voltage "A" Circuit Low." The control module detected that the 5-volt sensor reference 'A' supply voltage is below the expected range (typically a short to ground). Multiple sensors sharing this rail are affected.
What are the most common causes of P0642?
The most common causes of P0642 are: Short to ground in the reference 'A' circuit, Shorted sensor on the 'A' rail, Damaged/corroded wiring or connectors, Wiring pinched to ground, Internal PCM fault. The specific cause varies by vehicle.
How much does it cost to fix P0642?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P0642?
Au7o has documented P0642 across 1 vehicle models from 1 manufacturers: Hyundai.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.