
1996 GMC Sonoma SLE 4.3L MIL Lamp on
this truck came in with the check engine light on, code p0420, catalyst efficiency low, ...the pre and post cat o2 sensors were both ranging from below .100 to .900 rapidly very similar to the 2 front o2 sensors.......removed the cat, it looked good, but was a...
FIX posted 5/10/2008
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Message Closed w/FIX
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VIN | 1GTCS19X2T |
Engine | 4.3 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | FI |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | Always |
Trouble Codes
P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/FIX
Vehicle Data
1996 GMC Sonoma SLE
VIN | 1GTCS19X2T |
Engine | 4.3 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | FI |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | Always |
Trouble Codes
P0420 | Catalyst Efficiency Below Threshold (Bank 1) |