Pcm Code E013, Right Oxygen (O2) Sensor Not Ready: Action

PCM turns on SERVICE ENGINE SOON light and "closed loop" is disabled. When at operating temperature, a properly operating O2 sensor will drive PCM .45-volt reference signal lower (less than .45 volt) to indicate a lean mixture and higher (greater than .45 volt) to indicate a rich mixture. If O2 sensor does not vary from cold or not-ready voltage under test conditions, PCM assumes sensor cannot respond to air/fuel mixture changes and sets a PCM Code E013.

1. A voltage of .42-.48 displayed is a reference from PCM. O2 sensor must generate .15 volt greater than .45 reference voltage to register a cross count in PCM.
2. PCM compares voltage on circuit No. 412 to ground voltage on circuit No. 413. O2 sensor ground and PCM ground on terminal E15 must indicate good continuity (no voltage difference) with engine running.