Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
DTC P0430 - Three Way Catalytic converter Low effciency Bank 2 (this code should not affect starting, unless converter is 100% clogged)
DTC P0452 - Fuel tank pressure sensor- low voltage
Below is diagnostic testing for both codes. You need to address DTC P0452 code first. In order to do full testing in order to determine problem you will need a DVOM(digital voltmeter) and a level 2 diagnostic scanner.Most of the testing can be done with the DVOM. I strongly urge doing the diagnostic troubleshooting before replacing parts. It can just as easily be a short/open in wiring as a faulty part.
Diagnostic testing for DTC P0430:
Testing Procedure for DTC P0452:
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