1998 Volkswagen Beetle emissions trouble codes
Hello, My friend has a 1998 Volkswagen Beetle and im helping fix it, its throwing three codes (i forget the exact phrase) but the engine is running rich in open loop operation(bank 1 (obviously because theres only one bank) and lean in closed loop operation (bank 1). we dont have the money to just start replacing parts and hoping it works so i took it to my friend and we tested the catalytic converters and oxygen sensors. one oxygen sensor flucuated its reading from 10-0volts, the other fluctuated from 7-0 volts. what is the voltage at the oxygen sensors supposed to be? also the computer said the Catalytic converter was running at 560 degrees, but when we measured the temperature with a infra red heat gun, it said the exaust was 300 F before the catalytic and 200 F after, i might be wrong but isnt the exaust supposed to be hotter after the cat? and insigt into the VW specs would be a huge help...
Cars & Trucks - Volkswagen - Beetle - 1998 Volkswagen Beetle
Answers & Comments
If it says bank 1 sensor one it is the first one on the exhaust closest to the manifold.(up stream) if it says bank 1 sensor 2 it is the one after the cat (down stream) but it could be the mass air flow sensor