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Idahome
Joined: Wed May 2nd, 2018
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BUT do you have a stuck open injector? Run the engine until warm, goose the throttle then shut it down. Pull the plugs, any cylinders bank 2, 4-6) black and wet with fuel?
This would indicate a stuck open injector.....
Rich condition like yours there is not many ways that can happen. Either faulty 02 sensor effecting that bank, a fuel psi issue or a stuck open injector.
(also a dead cylinder in the ignition, could cause too much fuel)
The fact that your one code p1152 is a "lack of 02 sensor switching" and you have replaced that senor points to an issue with the wiring from PCM to that sensor.......OR a bad injector
It means the 02 sensor is sending signals far outside of the expected range at times. Usually this is wiring, BUT with your truck we also have the other code bank 2 rich, so.....
did you carefully check the pins inside the 02 sensor connector on the truck side? Any chance the wires got burned or pinched upstream?
If so then again we are most likely looking at a bad injector
Let us know what your compression test and the plugs show
Copy and paste from the intrawebz
Possible Causes
Error Code P1152 is usually caused by variable cylinder management system switching from on and off during light throttle conditions, cruising speeds, or when driving on a flat roads. The constant switching causes excessive oil consumption, leading to oil pressure to drop, until it can no longer run the VCM system. Other possible causes include:
Faulty Mass Airflow sensor
Faulty or leak in Intake Air System
Faulty fuel injector
Faulty fuel pump
Leak in exhaust system, fuel injector or fuel pressure regulator
Vacuum leak on engine
Fuel pressure too high or too low
Faulty or leaking secondary air injection system
Faulty PCM (rare)"
Last edited on Fri May 31st, 2019 01:38 pm by 410customs
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I build custom RBV, specializing in drivetrain conversions, wiring, suspension and complete custom trucks