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2000 GMC Sonoma 2.2L, If I'm driving for a short trip, I…

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2000 GMC Sonoma 2.2L, If...
2000 GMC Sonoma 2.2L, If I'm driving for a short trip, I don't notice any problems. When I drive more than 30min I start to lose power, the engine rev's randomly, and when I stop driving, it idles roughly or stalls out unless I keep revs up.
Submitted: 6 months ago.Category: GMC
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8/7/2017
GMC Mechanic: Dan, Technician replied 6 months ago
Dan
Dan, Technician
Category: GMC
Satisfied Customers: 25,251
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Databases
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GMC Mechanic: Dan, Technician replied 6 months ago

Is the check engine light on or does it come on during problem?

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Customer reply replied 6 months ago
it is usually on. When I last checked the code it was for the evap system. Sometimes the light has turned off when the truck is started.
GMC Mechanic: Dan, Technician replied 6 months ago

Check codes and let me know what they are, you can have this done at your local parts store for free. Keep me updated, thanks.

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Customer reply replied 6 months ago
This is what I pulled from "Intermittent Codes" om my OBD II reader, there are no current codes. No info on when they occurred.#Sun Aug 06 21:00:57 PDT 2017
Date=August 6, 2017
ReportData=
Model=sonoma
Make=GMC
RO=
Year=2000
Vin=\u00001GTCS1953Y8304867
-----------------------------------------------------------
Enhanced Faults (9:01:29 PM)
-----------------------------------------------------------P1137 - Powertrain - HO2S Bank1 Sens2 Lean Sys or Lo Volts
P1138 - Powertrain - HO2S Bank1 Sens2 Rich or Hi Volts
U1000 - Network - No Description Available
U1041 - Network - No Description Available
U1064 - Network - No Description Available
P0112 - Powertrain - Intake Air Temperature Circuit Low Input
P0125 - Powertrain - Insufficient Coolant Temperature for Closed Loop Fuel Control
P0131 - Powertrain - O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
P0132 - Powertrain - O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)
P0133 - Powertrain - O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
P0134 - Powertrain - O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
P1133 - Powertrain - HO2S Insufficient Switching Bank1 Sens1
P0137 - Powertrain - O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)
P0138 - Powertrain - O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
P0140 - Powertrain - No Description Available
P0141 - Powertrain - O2 Sensor Heater Circuit (Bank 1 Sensor 2)
P0171 - Powertrain - System too Lean (Bank 1)
P0172 - Powertrain - System too Rich (Bank 1)
P1171 - Powertrain - Fuel Sys Lean during Acceleration
P0325 - Powertrain - Knock Sensor 1 Circuit (Bank 1 or Single Sensor)
P0336 - Powertrain - Crankshaft Position Sensor A Circuit Range/Performance=
P0341 - Powertrain - Camshaft Position Sensor A Circuit Range/Performance (Bank 1 or Single Sensor)
P0340 - Powertrain - Camshaft Position Sensor A Circuit (Bank 1 or Single Sensor)
P0420 - Powertrain - Catalyst System Efficiency Below Threshold (Bank 1)
P0440 - Powertrain - Evaporative Emission Control System
P0410 - Powertrain - Secondary Air Injection System
P1441 - Powertrain - EVAP Emission Sys Flow during Non-Purge
P0442 - Powertrain - Evaporative Emission Control System Leak Detected (small leak)
P0446 - Powertrain - Evaporative Emission Control System Vent Control Circuit
P0461 - Powertrain - Fuel Level Sensor Circuit Range/Performance
P0502 - Powertrain - Vehicle Speed Sensor Circuit Low Input
P0562 - Powertrain - System Voltage Low
P0563 - Powertrain - System Voltage High
P0601 - Powertrain - Internal Control Module Memory Check Sum Error
P0602 - Powertrain - Control Module Programming Error
P1621 - Powertrain - PCM Memory Perf
P1626 - Powertrain - Theft Deterrent Sys Fuel Enable Circ
P1631 - Powertrain - Theft Deterrent Sys-Password *****
P1632 - Powertrain - Theft Deterrent Sys-Fuel disabled
P0130 - Powertrain - O2 Sensor Circuit (Bank 1 Sensor 1)
P0128 - Powertrain - Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
P0169 - Powertrain - Incorrect Fuel Composition
GMC Mechanic: Dan, Technician replied 6 months ago

Holy molly that is a lot of codes, erase codes and check them again when they come back. Let me know, thanks.

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Customer reply replied 6 months ago
Is there anything in there that points to the problem I have with longer trips?
GMC Mechanic: Dan, Technician replied 6 months ago

Based on symptoms and codes it sounds like you have a large vacuum leak somewhere. You can spray starting fluid around intake gaskets, throttle body gasket, and vacuum lines to see if idle changes if so look in that area for vacuum leaks. The coolant temp sensor can also cause it to run rough so I'd consider replacing that too. But before replacing anything I'd reset codes and check them after a couple drives and see what comes back first. Keep me updated, thanks.

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Customer reply replied 6 months ago
Here is the Freeze Frame when the code kicked on:Confirmed Trouble Codes
-P0122: Throttle/Pedal Position Sensor/Switch "A" Circuit Low (Powertrain, Generic)Pending Trouble Codes
-P0122: Throttle/Pedal Position Sensor/Switch "A" Circuit Low (Powertrain, Generic)Permanent Trouble Codes
-noneFreeze Frame
-P0122: Throttle/Pedal Position Sensor/Switch "A" Circuit Low (Powertrain, Generic)
-Fuel system status: Fuel system A: Closed loop (1)
-Fuel system status: Fuel system B: NA
-Calculated engine load: 9.0 %
-Engine Coolant Temperature: 195 °F
-Short Term Fuel Trim - Bank 1: -10.9 %
-Long Term Fuel Trim - Bank 1: 7.8 %
-Intake Manifold Absolute Pressure: 5.3 inHg
-Engine RPM: 1975 RPM
-Vehicle Speed Sensor: 44 mphDiagnostic information provided by OBD Auto Doctor
GMC Mechanic: Dan, Technician replied 6 months ago

Did it start running rough when this code set?

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Customer reply replied 6 months ago
It started to lose a little power and have slight random revs. RPM and Oil pressure dropped when I had to stop next.
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 6 months ago
Tims Auto Repair
Tims Auto Repair, GMC Mechanic
Category: GMC
Satisfied Customers: 16,201
Experience: have owned a repair shop for 25 years
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GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 6 months ago

lets clear all those codes,,then drive it till the engine light first comes on,then give me the code/codes you get then

thanks

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