RayMich
Well-Known Member
Good afternoon and Happy New Year to ALL.
I am having a major problem with my son's snowplow truck and I hope that someone here can help us diagnose and fix it.
The truck is a 2002 Silverado 2500HD 4WD with the 6.0L engine and auto trans. It has approximately 185,000 miles.
He bought this truck 6 years ago. It has been serviced every 5,000 miles and it has run great up until 3 weeks ago.
The truck runs fine when cold, but after running for 5 minutes or so, it falls flat on its face, starts running rough and won't go over 20 MPH.
My code reader FIRST detected the following codes:
My son did say that the fuel gauge has not worked for a couple of months, but the truck ran fine until 3 weeks ago.
One of our local exhaust shops told my son that the Mass Air Flow Sensor was bad and both Cat Converters were plugged, and with much reluctance my son agreed for them to replace both converters and a new muffler to the tune of $889.00 because he needed to get it running ASAP since he is missing out on a lot of snowplow work.
- Leaving the shop, the truck ran great for about 5 minutes then the power fell right off, the SEL started flashing again, the engine started to misfire and it would not go over 20 MPH even with throttle floored.
The Mass Air Flow Sensor and air filter were replaced. All spark-plugs and plug wires were replaced TWICE. All the plugs appear to be getting a nice hot spark. Interestingly, all four plugs on the RH (Passenger Side) are getting fowled, while those on the LH (Driver Side) look fine.
If we let the engine cool down to ambient temperature and clear all the codes, it will run great for the first 5 minutes when started, then as soon as it warms up while driven, the Service Engine Light starts flashing again and power falls off. Checking the codes again, we get these codes.
He tried to replace the Bank 2 O2 Sensor 1 on the passenger side, but it is rusted on and the hex started to strip, so he stopped trying.
If someone can please help us troubleshoot this so we can get it fixed and back on the road, it will be greatly appreciated, because right now the truck is out of service and has already cost my son over $6,000 in lost revenue.
Thank you in advance for any help you folks can provide.
I am having a major problem with my son's snowplow truck and I hope that someone here can help us diagnose and fix it.
The truck is a 2002 Silverado 2500HD 4WD with the 6.0L engine and auto trans. It has approximately 185,000 miles.
He bought this truck 6 years ago. It has been serviced every 5,000 miles and it has run great up until 3 weeks ago.
The truck runs fine when cold, but after running for 5 minutes or so, it falls flat on its face, starts running rough and won't go over 20 MPH.
My code reader FIRST detected the following codes:
P0131 - O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
P0154 - O2 Circuit No Activity Detected (Bank 2 Sensor 1)
P0300 - Random Multiple Misfires Detected
P0332 - Knock Sensor 2 Circuit Low Input (Bank 2)
P0461 - Fuel Level Sensor A Circuit Range/Performance
P0463 - Fuel Level Sensor A Circuit - High Input
P0154 - O2 Circuit No Activity Detected (Bank 2 Sensor 1)
P0300 - Random Multiple Misfires Detected
P0332 - Knock Sensor 2 Circuit Low Input (Bank 2)
P0461 - Fuel Level Sensor A Circuit Range/Performance
P0463 - Fuel Level Sensor A Circuit - High Input
My son did say that the fuel gauge has not worked for a couple of months, but the truck ran fine until 3 weeks ago.
One of our local exhaust shops told my son that the Mass Air Flow Sensor was bad and both Cat Converters were plugged, and with much reluctance my son agreed for them to replace both converters and a new muffler to the tune of $889.00 because he needed to get it running ASAP since he is missing out on a lot of snowplow work.
- Leaving the shop, the truck ran great for about 5 minutes then the power fell right off, the SEL started flashing again, the engine started to misfire and it would not go over 20 MPH even with throttle floored.
The Mass Air Flow Sensor and air filter were replaced. All spark-plugs and plug wires were replaced TWICE. All the plugs appear to be getting a nice hot spark. Interestingly, all four plugs on the RH (Passenger Side) are getting fowled, while those on the LH (Driver Side) look fine.
If we let the engine cool down to ambient temperature and clear all the codes, it will run great for the first 5 minutes when started, then as soon as it warms up while driven, the Service Engine Light starts flashing again and power falls off. Checking the codes again, we get these codes.
P0154 - O2 Circuit No Activity Detected (Bank 2 Sensor 1)
P0300 - Random Multiple Misfires Detected
P0332 - Knock Sensor 2 Circuit Low Input (Bank 2)
P0461 - Fuel Level Sensor A Circuit Range/Performance
P0463 - Fuel Level Sensor A Circuit - High Input
P0300 - Random Multiple Misfires Detected
P0332 - Knock Sensor 2 Circuit Low Input (Bank 2)
P0461 - Fuel Level Sensor A Circuit Range/Performance
P0463 - Fuel Level Sensor A Circuit - High Input
He tried to replace the Bank 2 O2 Sensor 1 on the passenger side, but it is rusted on and the hex started to strip, so he stopped trying.
If someone can please help us troubleshoot this so we can get it fixed and back on the road, it will be greatly appreciated, because right now the truck is out of service and has already cost my son over $6,000 in lost revenue.
Thank you in advance for any help you folks can provide.
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