Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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Your catalyst efficiency code means the converter is starting to clog and is no longer cleaning the emissions. This can cause a power loss. The MAF sensor code can normally be resolved by just spray cleaning the MAF sensor with brake cleaner to clean it of debris effecting its reading performance. The solenoid code can mean the solenoid has failed but can also mean another issue within the transmission is occurring and the computer thinks the solenoid operation is to blame. Any noticed concerns with the transmission in any gear, up shifts or downshifts?
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Actually these are all 3 separate issues. The MAF sensor has a slim possibility of causing the converter code but its slim. Addressing the MAF code first by cleaning it then clearing the codes is what needs to be done first. The trans code is in no way related to the others but if your noticing no symptoms what so ever with the transmission then the solenoid is likely just weak and failing intermittent.
Are all shifts at highway speed effected or just a certain shift like 3-4 for example?
Have you ever done transmission repairs?
Thanks for this trans code I feel like the wisest choice is to get the engine running right first. Can you try cleaning the MAF sensor, clearing the codes and retesting. Is there still a converter code, if so then it needs to be replaced. Also let me know all codes that return.
Glad you got it resolved, suprised you were getting no lean codes from the O2 sensors.