04 dodge neon trubble code plz help?

wood stock

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OBD II Trouble Code List (P0XXX Codes) - Continued


P0137 1T CCM 2004-05 Neon O2 (B1 S2) Sensor Circuit Low Conditions: Engine running; battery voltage over 10.9v; O2 heater temperature below 484°F (251C) or ECT above 170F from previous key off. The PCM detected the O2 Sensor signal voltage was less than 2.402v for 9 seconds (Neon) Possible Causes: O2 return circuit is shorted to ground O2 signal circuit is shorted to ground, or to O2 return circuit, or O2 heater ground circuit O2 Sensor has failed PCM has failed

this is the code i get and what it tells me what does it mean?
 
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