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Hyundai Terracan 2.9d P1640
08-05-2022, 20:12 PM,
Post: #1
12manux Offline
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Hyundai Terracan 2.9d P1640
hi guys...


working on a 2003 Terracan 2.9.

Customer changed engine ,all good ,left the shop no issue ,that washed engine bay ,and since then the car is no starting and throwing P1640 code (MAIN RELAY CONTROL CIRCUIT MALFUNCTION )

All wiring ,fuse,relays have been verified and everything is ok.

Now from what i see i think that the ECU might be faulty .From what i saw on internet this P1640 is usually related with engine ECU.I will order one and make it virgin but until than i need some opinions from you guys.
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08-05-2022, 21:29 PM,
Post: #2
evgenijj Offline
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RE: Hyundai Terracan 2.9d P1640
Check the fuse and wiring.
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09-05-2022, 05:36 AM,
Post: #3
12manux Offline
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RE: Hyundai Terracan 2.9d P1640
All ok both fuses /relays and wiring
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