2004 Chevrolet Tahoe Q&A
2004 Chevrolet Tahoe Question: Getting 2 engine codes; PO134 & PO135. What do these codes mean.
OX SENSOR HEATER CIRCUIT ISSUES. COULD BE SENSORS OR WIRING ISSUES.SEEK COMPLETE DIAG AS TO NOT WASTE MONEY - globalhelper
Codes are for the heater circuits on 2 separate oxygen sensors. Suspisious that you 2 go at same time. Could be te sensors themselves. But posssible causes are: Oxygen (O2) Sensor Wiring, Oxygen Sensors, or Powertrain Control Module (PCM) I cannot help you with cost....need to pin down whats wrong first.u - milesauto