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2006 Cadillac DTS 4.6L MIL Lamp on, open loop
The vehicle intermittently goes into an open loop, even when sitting at a lite. When it goes into an open loop, p0420 kicks in. When I snap the throttle, it goes into an open loop, then back to a closed loop.
FIX posted 5/1/2023
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Message Closed w/FIX
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11 Replies Received
11 Replies Received
Related Documents & Media | VIN | 1G6KD57Y86 |
| Engine | 4.6 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / P0420,open loop |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp on, Open Loop |
| Occurs | Intermittently |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/FIX
Vehicle Data
2006 Cadillac DTS
| VIN | 1G6KD57Y86 |
| Engine | 4.6 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / P0420,open loop |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp on, Open Loop |
| Occurs | Intermittently |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Video