Removal of rear oxygen sensors info

Tom F&L GoR

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Guys, let's not automatically link the CEL with a safe mode. A failed gas cap or removal of rear O2 sensors will trigger the light, but not behave differently. A failed TPS or MAP sensor may also trigger a CEL, but the resulting driveability is the ECU trying to manage to run the engine anyway, not that the yellow light condition forced it into a limp-in mode. The light comes on for lots of reasons, but the commands to change the fuel strategy is to keep it running.
 
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