Service Engine Soon light on 2002 GMC Yukon

Asked by GuruQ3K62 Nov 27, 2019 at 10:55 AM about the 2002 GMC Yukon SLT

Question type: Maintenance & Repair

The Service engine soon light appears on my 2002 GMC Yukon.  Took it to Auto Zone for a read out and it read a P0300 code:  Replace Fuel Pressure Regulator.  After it was replaced the light went out for about 10 minutes now it is back on again.  What could be the problem?

2 Answers

189,445

for that code it could be the following: P0300 GMC Possible Causes Faulty spark plug (s) Faulty ignition coil (s) Clogged or faulty fuel injector (s) Intake air leak Fuel injectors harness is open or shorted Fuel Injectors circuit poor electrical connection Ignition coils harness is open or shorted Ignition coils circuit poor electrical connection Insufficient cylinders compression Incorrect fuel pressure.

5 people found this helpful.
200

Autozone said replace fuel pressure regulator? Don't ever go by that (as you already learned the hard way)

3 people found this helpful.

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