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2004 GMC Envoy SLE 4.2L MIL Lamp on
Posted to GM Driveability on 12/18/2010 8 Replies

Over the past year or so this Envoy (which belongs to the office manager) has a problem where the PCM sets P1133 about twice a month or less. The problem is intermittent and always seems to run fine. However, the lights get rythmically dim then bright for 10 s...

8 Replies Received (View Replies)

  Related Documents & Media  2004 GMC Envoy SLE

 
Message Closed w/FIX

car Vehicle Data

2004 GMC Envoy SLE

VIN 1GKDT13S04
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursIntermittently

Trouble Codes

P0136Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit Malfunction
P1133Heated Oxygen Sensor (Bank 1 Sensor 1) Insufficient Switching
Message Closed w/FIX

car Vehicle Data

2004 GMC Envoy SLE

VIN 1GKDT13S04
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursIntermittently

Trouble Codes

P0136Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit Malfunction
P1133Heated Oxygen Sensor (Bank 1 Sensor 1) Insufficient Switching