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2002 GMC Sierra 1500 SL 4.8L MIL Lamp on
Have cat code Bank one - PO420 - efficiency below threshold. Also has a pending code for the same code. This code appeared before (within one year), was cleared and not returned until today. Question is freeze frame showed code setting at 588 RPM, 0% throttle,...
FIX posted 6/26/2006
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Message Closed w/FIX
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Related Documents & Media | VIN | 2GTEK19V12 |
| Engine | 4.8 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Not Applicable |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/FIX
Vehicle Data
2002 GMC Sierra 1500 SL
| VIN | 2GTEK19V12 |
| Engine | 4.8 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Not Applicable |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Video