PO420 catalyst effiniency below threshold bank 1 Need to replace catalyst converter.
...I agree with the 2nd solution but I think there is a faster and better way to check out the catalyst converter: go under the truck and look in catalyst for burned color, if catalyst seem to
...oxides of nitrogen (NOx), the engine controls system uses a 3-way catalytic converter (TWC). The catalyst within the TWC promotes a chemical reaction, which oxidizes the HC and CO that are present ...
...bad smell and exhaust was very hot . i know there are other reasons for code but do u think its the catalyst system. Your good problem description has help alot - your vehicle has exhibited the ...
...code po420 I think you got misinformed about what fault P0420 is, the GM manual says this: "P0420 - Catalyst System Low Efficiency" What does that mean? it means the main catalytic converter in the ...
...(EGR) Excessive Flow Detected PO410: Secondary Air Injection System Malfunction PO420: Catalyst System Efficiency Below Threshold (Bank 1) PO421: Warm-Up Catalyst Efficiency Below ...
...Sensor 2).The bank 1 is where the number 1 cylinder is exhaust.sensor 2 is the one after converter catalyst , it control the catalyst converter is doing is ...
Catalyst not ready rear 02 sensor defective or (s2 bank one or two ) drive cycle has not reset the monitor yet,, Catalyst is the longest to reset usually
Question about 2004 TrailBlazer
where is the oxygelazern sensor downstream located on 04 trailb The pre-catalyst is located on the exhaust manifold passenger side and the post-catalyst is located on the just after catalyst converter
...not going away new exhaust system no converters covers other aspects as well. P0420 Chevrolet - Catalyst System Low Efficiency Bank 1 Repair Importance Level: 2/3 Repair Difficulty Level: 2/3 3 ' ...
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