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Dave Nova
Dave Nova, Chevrolet Technician
Category: Chevy
Satisfied Customers: 19452
Experience:  ASE Master Certification. GM World Class Certification
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trouble codes PO151,PO174 & PO300 for a 2001 chevy p.u.

Customer Question

trouble codes PO151,PO174 & PO300 for a 2001 chevy p.u.
Submitted: 7 years ago.
Category: Chevy
Expert:  Dave Nova replied 7 years ago.

The O2 sensor for the passenger side is indicating lean, and the heater for that O2 sensor is not properly working and the engine is detecting a misfire. I would suggest replacing the primary O2 sensor on the passenger side of the engine. Bank 2, sensor 1. (#11 in diagram)