1997 Chevy Cavalier Code PO134

1997 CHEVROLET CAVALIER
225,000 MILES • 4 CYL • 2WD • AUTOMATIC
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SCOTTSBAYGIRL
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  • 2 POSTS
code PO134 appears, comes back even after changing O2 Sensor
Feb 6, 2010 at 4:38 PM
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MHPAUTOS
  • ✓ASE Certified Mechanic
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Hi there,

You will need to check the circuit back to the ECU, i feel that this is a wiring fault.

mark, mhpautos
Feb 6, 2010 at 4:43 PM
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SCOTTSBAYGIRL
  • MEMBER
  • 2 POSTS
it's fine untill engine reaches operating temperature then the PO134 code comes back again
Feb 6, 2010 at 4:50 PM
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MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
Hi there,

P0134 Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

I would still be checking the continuity back to the ECU as you say the sensor has been replaced, otherwise you may be looking at an ECU internal fault.

mark, mhpautos
Feb 6, 2010 at 8:20 PM
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