P0106 in the middle of summer - Chevy and GMC Duramax Diesel Forum
07.5-10 LMM Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 32 (permalink) Old 08-06-2019, 05:49 PM Thread Starter
 
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P0106 in the middle of summer

So my truck(2009 2500 LMM) has been giving me the P0106 code for the past few days. I have tried clearing the code, that works sometimes.

I also have changed the air filter(used to have K&N went back to stock), changed MAP sensor and MAF sensor.

It could be just me, but it seems like when its hot and humid(humid for Colorado) is when I get it.

Anyone have any ideas?
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post #2 of 32 (permalink) Old 08-06-2019, 08:04 PM
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Do you have a way to check and compare the BARO psi to your altitude with the MAP psi ?

Did you use AC Delco sensors ?
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File Type: jpg A21D3453-57B3-48B3-8530-FCD135CDA281.jpg (72.2 KB, 62 views)

Dan
2007.5 GMC Sierra 3500 SRW L.B."BLACK" C.C. 4X4 LMM Z71
DIY stock airbox mod, aFe ProGuard 7, OEM drop-in
EFILive ECM ATP - Heavy Tow Tune with Turbo Brake.
EFILive TCM Duramax Tuner
DHD Cold Side High Flow Intake Pipe
DHD PCV Re-Route
AirDog 4G100

2007 Yukon Denail "BLACK" 6.2 gasser
DIY stock AirBox Mod, K&N, Airaid intake, EFILive TCM only tuning

Last edited by D_R_C; 08-06-2019 at 08:20 PM.
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post #3 of 32 (permalink) Old 08-06-2019, 08:21 PM Thread Starter
 
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I have an edge tuner also, not sure how to pull that up on there. I can do some exploring. Where is the Baro sensor located?
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post #4 of 32 (permalink) Old 08-06-2019, 08:22 PM Thread Starter
 
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and yes on the ac delco
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post #5 of 32 (permalink) Old 08-07-2019, 08:31 AM
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DTC P0106

Diagnostic Instructions

DTC Descriptor

DTC P0106

  • Manifold Absolute Pressure (MAP) Sensor Performance
Diagnostic Fault Information






Typical Scan Tool Data





Circuit/System Description

The manifold absolute pressure (MAP) sensor measures the pressure inside the intake manifold. Pressure in the intake manifold is affected by turbocharger output, engine speed, accelerator pedal input, air temperature, and barometric pressure (BARO). A diaphragm within the MAP sensor is displaced by the pressure changes that occur from the varying load and operating conditions of the engine. The engine control module (ECM) supplies a regulated 5 volts to the sensor on the 5-volt reference circuit. The ECM supplies a ground on the low reference circuit. The MAP sensor provides a signal voltage to the ECM, relative to the pressure changes, on the MAP sensor signal circuit. The ECM converts the signal voltage input to a pressure value. Under normal operation, the lowest pressure that can exist in the intake manifold is equal to the BARO. This occurs when the vehicle is operating at idle or when the ignition is ON, while the engine is OFF. The ECM uses the MAP sensor to aid in diagnosis of the turbocharger performance. The highest manifold pressures occur when the turbocharger output is high. Manifold pressure can range from 58 kPa (8 psi) when pressure are low, to more than 240 kPa (34 psi) when pressures are high, depending on the BARO. The MAP sensor has a range of 43-255 kPa (6-36 psi).

Conditions for Running the DTC

  • DTCs P0107, P0108, P2228, P2229 are not set.
  • The engine speed is less than 760 RPM.
  • The exhaust gas recirculation (EGR) valve is not commanded ON.
  • This DTC runs continuously when the above enabling conditions are met.
Conditions for Setting the DTC

The ECM detects that the BARO and MAP sensors disagree by greater than 14 kPa with the ignition ON, for greater than 10 seconds.

Action Taken When the DTC Sets


  • DTC P0106 is a Type A DTC.
  • DPF Regeneration is inhibited.
  • The ECM commands reduced engine power mode.
  • A message center or an indicator may display Reduced Engine Power.
Conditions for Clearing the DTC

DTC P0106 is a Type A DTC.

Diagnostic Aids


Special Tools


  • J 23738-A Mityvac
  • J 35555 Metal Mityvac
Circuit/System Verification


  1. Verify that DTCs P0698 or P0699 are not set.
    • If any of the DTCs are set, refer to DTC P0698 or P0699. See: P0698
  1. Verify that restrictions do not exist in the exhaust system. Refer to Restricted Exhaust. See: Engine, Cooling and Exhaust\Exhaust System\Testing and Inspection\Symptom Related Diagnostic Procedures\Restricted Exhaust
  2. Verify that the engine is in good mechanical condition before continuing with this diagnostic. Refer to Symptoms - Engine. See: Engine, Cooling and Exhaust\Engine\Testing and Inspection\Symptom Related Diagnostic Procedures\- Symptoms - Engine Mechanical
  3. Ignition OFF for 90 seconds, determine the current vehicle testing altitude.
  4. Ignition ON, observe the scan tool MAP Sensor parameters. Compare the parameter to the Altitude Versus Barometric Pressure. The BARO sensor pressure parameter should be within the specified range indicated in the table.
  5. Ignition ON, observe the scan tool MAP and BARO parameters. The MAP and BARO sensor parameters should be within 14 kPa of each other.
  6. Engine running, observe the scan tool MAP Sensor parameter. Slowly increase the engine speed to 2,000 RPM, then allow the engine speed to return to a stable idle. The MAP Sensor parameter should increment to a higher value at 2,000 RPM and then return to near BARO at idle speed.
  7. Operate the vehicle within the Conditions for Running the DTC to verify that the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing

Important: You must perform the Circuit/System Verification before proceeding with the circuit/system testing.

Important: You must perform the Repair Verification after completing the circuit/system testing.


  1. Verify the integrity of the entire air induction system by inspecting for the following conditions:
    • Damaged components
    • Loose or improper installation
    • An air flow restriction or leak
    • Any snow or ice build-up in the air cleaner or MAF Sensor
    • Any ice, water, coking, or restrictions at the MAP Sensor Port
  1. Ignition ON, engine OFF, observe the scan tool BARO parameter. Compare the BARO parameter to the range specified in the Altitude Vs. Barometric Pressure table. Refer to Altitude Versus Barometric Pressure.
    • If the BARO parameter is outside the range specified, replace the ECM.
  1. Ignition OFF, disconnect the harness connector at the MAP sensor.
  2. Ignition OFF for 90 seconds, test for less than 5 ohms between the low reference circuit terminal A and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
  1. Ignition ON, test for the 4.8-5.2 volts between the 5-volt reference circuit terminal C and ground.
    • If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
    • If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  1. Verify the scan tool MAP parameter is less than 45 kPa.
    • If greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the ECM.
  1. Install a 3A fused jumper wire between the signal circuit terminal B and the 5-volt reference circuit terminal C. Verify the scan tool MAP parameter is greater than 253 kPa.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
  1. If all circuits test normal, test or replace the MAP sensor.
Component Testing

Important: You must perform the Circuit/System Testing in order to verify the integrity of the MAF sensor circuits before proceeding with the Component Testing.


  1. Ignition OFF, remove the MAP sensor.
  2. Install a 3A fused jumper wire between the 5-volt reference terminal C and the corresponding terminal of the MAP sensor
  3. Install a jumper wire between the low reference terminal A of the MAP sensor and ground.
  4. Install a jumper wire at the signal terminal B of the MAP sensor.
  5. Connect a DMM between the jumper wire from terminal B of the MAP sensor and ground.
  6. Ignition ON, with the J 23738-A or J 35555, slowly apply vacuum to the sensor while observing the voltage on the DMM. The voltage should vary between 4.9-0.02 volts, without any spikes or dropouts.
    • If the voltage is erratic, replace the MAP sensor.
Repair Instructions


  • Exhaust Particulate Filter Cleaning (LMM DPF Regeneration Enable) Exhaust Particulate Filter Cleaning (LMM DPF Service Regeneration) for DPF Regeneration Enable.
  • Manifold Absolute Pressure Sensor Replacement
Repair Verification


  1. Engine running, observe the scan tool MAP and BARO parameters. The MAP and BARO sensor parameters should be within 5 kPa of each other.
  2. Engine running, command the turbocharger Vane Pos. Ctrl. Solenoid valve ON. With a scan tool, slowly increase the engine speed from idle to 2,000 RPM and then return the engine to idle speed. The MAP sensor parameter should increment to a higher value and then return to a near BARO value at idle.

Ron Nielson
2008 Silverado LT, CCLB, Edge Insight CTS
2009 Arctic Fox 29-5T, Silver Fox Edition, Onan 3600 LPG generator
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post #6 of 32 (permalink) Old 08-07-2019, 10:51 AM
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I've searched online and even looked under my hood I can't find the BARO, supposedly on the driverside under the 2 large plugs.
Many have explained with lots of talk about the Baro, but no one has included any pictures, that I can find.

Anyway the info I have from one of the better sources is are the BARO numbers close to your altitude and if your MAP psi is within 1 psi of the BARO your in good shape while idling.

Dan
2007.5 GMC Sierra 3500 SRW L.B."BLACK" C.C. 4X4 LMM Z71
DIY stock airbox mod, aFe ProGuard 7, OEM drop-in
EFILive ECM ATP - Heavy Tow Tune with Turbo Brake.
EFILive TCM Duramax Tuner
DHD Cold Side High Flow Intake Pipe
DHD PCV Re-Route
AirDog 4G100

2007 Yukon Denail "BLACK" 6.2 gasser
DIY stock AirBox Mod, K&N, Airaid intake, EFILive TCM only tuning
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post #7 of 32 (permalink) Old 08-07-2019, 12:20 PM
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Ron Nielson
2008 Silverado LT, CCLB, Edge Insight CTS
2009 Arctic Fox 29-5T, Silver Fox Edition, Onan 3600 LPG generator
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post #8 of 32 (permalink) Old 08-07-2019, 12:38 PM
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Yes, I had already watched this redneck utube rusty engine video, I have to change to chrome to even view it, but I/you still don't see where its actually at just a general location area yes.
I still could not find mine with out maybe removing a few things, sorry but I'm not going to do that unless I'll need to replace mine.

Dan
2007.5 GMC Sierra 3500 SRW L.B."BLACK" C.C. 4X4 LMM Z71
DIY stock airbox mod, aFe ProGuard 7, OEM drop-in
EFILive ECM ATP - Heavy Tow Tune with Turbo Brake.
EFILive TCM Duramax Tuner
DHD Cold Side High Flow Intake Pipe
DHD PCV Re-Route
AirDog 4G100

2007 Yukon Denail "BLACK" 6.2 gasser
DIY stock AirBox Mod, K&N, Airaid intake, EFILive TCM only tuning
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post #9 of 32 (permalink) Old 08-30-2019, 09:04 AM
 
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LMM barometric sensor

I'm still struggling with a truck that goes into limp infrequently but when it does it can occur back to back. Sometimes the truck will run fine for a month, other times it throws P0106s one after another. It usually does this when idling for more than a few seconds ....often when at a stop light in heavy traffic. I have to drive with my android on my lap and the torque program at ready. The truck has become all but unusable.
The previous video shows the baro sensor found on the older trucks, but I'm beginning to think that on an LMM it is built into the ECM, can anyone confirm this?
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post #10 of 32 (permalink) Old 08-30-2019, 10:08 AM
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Repeat of post #2

Have you clean your MAP sensor ?
What’s the BARO reading compared to the MAP reading ?
Is the BARO reading close to the altitude your at ?
Is there more than 2, within 1 is better between the BARO and MAP#’s while idling ?


What’s your MAF g/s reading idling ?
Attached Images
File Type: jpg C9FF2C85-2023-450A-8C11-39BFF4E4ADE9.jpg (72.2 KB, 27 views)

Dan
2007.5 GMC Sierra 3500 SRW L.B."BLACK" C.C. 4X4 LMM Z71
DIY stock airbox mod, aFe ProGuard 7, OEM drop-in
EFILive ECM ATP - Heavy Tow Tune with Turbo Brake.
EFILive TCM Duramax Tuner
DHD Cold Side High Flow Intake Pipe
DHD PCV Re-Route
AirDog 4G100

2007 Yukon Denail "BLACK" 6.2 gasser
DIY stock AirBox Mod, K&N, Airaid intake, EFILive TCM only tuning

Last edited by D_R_C; 08-30-2019 at 10:14 AM.
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