P163A Diagnostic Trouble Code Discussion for October 2025
Fuel pressure regulator circuit performance
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| Help Request | Posted | |
| 2018 GMC Acadia SLT 3.6L MIL Lamp on, Reduced power mode VIN: 1GKKNSLS3J P163A: Fuel pressure regulator circuit performance. ... DIYer. We replaced engine with used. Car runs great until hard accel. It will go into reduced engine power mode and sets a p0091. It has set a P163A a couple times, but usually sets the P0091. The code says the FP... |
October 14, 2025 |
