Codes P0521, P0340, P0341 and P0016, after replacing the rear main seal?

Tiny
SAELI SAELI
  • MEMBER
  • 2006 GMC ENVOY
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 199,000 MILES
I replaced the rear main seal on my vehicle listed above xl Denali and now I have codes, P0521, P0340, P0341, and P0016.
Thursday, April 24th, 2025 AT 7:04 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
So all of these codes can be because the engine oil is dirty or low. I would make sure the engine oil is in good shape and then clear the codes and drive it. Can I ask if you are hearing any noises from the engine at idle?

P0521 - Engine Oil Pressure Sensor/Switch Range/Performance

P0340 - Camshaft Position Sensor “A” Circuit Bank 1

P0341 - Camshaft Position Sensor Range/Performance

P0016 - Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)

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Friday, April 25th, 2025 AT 10:32 AM

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