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2006 Cadillac CTS 2.8L MIL Lamp on
Posted to GM Driveability on 3/13/2015 9 Replies

after we replaced both cats & all 4 heated o2 sensors things were good, engine code p420 was gone & oxygen readings were good, next day customer comes back with 2 codes [...], checked my scanner verified vehicle is running on open loop only, when cold its open...

9 Replies Received (View Replies)

  Related Documents & Media  2006 Cadillac CTS

 
Message Closed w/FIX

car Vehicle Data

2006 Cadillac CTS

VIN 1G6DM57T46
Engine2.8 L / 6 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFuel Injection / EFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursHot

Trouble Codes

P2231Oxygen Sensor (Bank 1 Sensor 1) Signal Circuit Shorted To Heater Circuit
P2234ABS DTC External Quality Control Fault Present
Message Closed w/FIX

car Vehicle Data

2006 Cadillac CTS

VIN 1G6DM57T46
Engine2.8 L / 6 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFuel Injection / EFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursHot

Trouble Codes

P2231Oxygen Sensor (Bank 1 Sensor 1) Signal Circuit Shorted To Heater Circuit
P2234ABS DTC External Quality Control Fault Present