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2004 Chevrolet Silverado 1500 5.3L Misfire
Tia for any help y'all can provide. Please read related repair history. Customer returned with truck still exhibiting intermittent idle misfire. We removed the heads for a valve job and replaced a warped intake manifold. After reassembly we still had the m...
FIX posted 9/10/2023
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Message Closed w/FIX
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14 Replies Received
14 Replies Received
Related Documents & Media | VIN | 1GCEC14T14 |
| Engine | 5.3 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire |
| Occurs | Idle, Intermittently |
Trouble Codes
| P0156 | Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Malfunction |
| P0300 | Multiple Misfire Detected |
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/FIX
Vehicle Data
2004 Chevrolet Silverado 1500
| VIN | 1GCEC14T14 |
| Engine | 5.3 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire |
| Occurs | Idle, Intermittently |
Trouble Codes
| P0156 | Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Malfunction |
| P0300 | Multiple Misfire Detected |
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Video