DTC P1635 GMC

11.10.2025

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Vehicle engine and/or automatic transmission

Code: P1635 - The 5-volt reference circuit, which supplies power to engine sensors, has a problem affecting sensor operation.

dtc p1635 GMC

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The following error codes are often searched for

P0299 P0300 P0301 P0302 P0303 P0304 P0305 P0306 P0307 P0308 P0315 P0316 P0325 P0326 P0327 P0328 P0330 P0332 P0335 P0336

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