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DTC P0106, P0107, or P0108

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    • Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0106 00: Manifold Absolute Pressure (MAP) Sensor Performance

DTC P0107 00: Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage

DTC P0108 00: Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage

Diagnostic Fault Information

Circuit

Short to Ground

High Resistance

Open

Short to Voltage

Signal Performance

5V Reference

P0107 00

P0106 00, P0107 00

P0107 00

P0108 00

P0106 00, P0107 00

MAP Signal

P0107 00

P0106 00, P0107 00

P0107 00

P0106 00, P0108 00

P0106 00, P0107 00

Low Reference

-

P0106 00, P0107 00

P0106 00, P0108 00

-

P0106 00, P0108 00

Typical Scan Tool Data

MAP Sensor

Circuit

Short to Ground

Open

Short to Voltage

Operating Conditions: Engine running, transmission in Park or Neutral

Parameter Normal Range: 20-48 kPa (2.9-7 PSI) (varies with altitude)

5 V Reference

5 V Reference

0 kPa, (0 PSI)

127 kPa (18.4 PSI)

MAP Signal

0 kPa, (0 PSI)

0 kPa, (0 PSI)

127 kPa (18.4 PSI)

Low Reference

-

127 kPa (18.4 PSI)

-

Circuit/System Description

The MAP sensor has a 5 V reference circuit, a low reference circuit, and a signal circuit. The engine control module (ECM) supplies 5 V to the MAP sensor on a 5 V reference circuit, and provides a ground on a low reference circuit. The MAP sensor provides a voltage signal to the ECM on a signal circuit relative to the intake manifold pressure changes.

Conditions for Running the DTC

P0106 00

    • DTCsP0107 00, P0108 00, P0111 00, P0112 00, P0113 00, P0114 00, P0116 00, P0117 00, P0118 00, P0119 00, P0128 00, P0335 00, P0336 00 are not set
    • The engine is running greater than or equal to 400 RPM.
    • The intake air temperature (IAT) Sensor parameter is between -7 to +125°C (19-257°F).
    • The engine coolant temperature (ECT) Sensor parameter is between 70-125°C (158-257°F).
    • This DTC runs continuously when the above conditions are met.

P0107 00

    • DTCsP0120 00, P0121 00, P0122 00, P0123 00, P0220 00, P0221 00, P0222 00, P0223 00 or P0641 00 are not set.
    • The engine is running greater than or equal to 400 RPM.
    • The throttle position is greater than or equal to 0% when the engine speed is less than or equal to 1 000 RPM

OR

    • The throttle position is greater than or equal to 12.5% when the engine speed is greater than 1 000 RPM.
    • The DTC runs continuously when the above conditions are met.

P0108 00

    • The engine has been running for a length of time that is determined by the start-up coolant temperature. The length of time ranges from 5.5 min at colder than -30°C (-22°F) to 10 s at greater than 30°C (+86°F).
    • DTCsP0120 00, P0121 00, P0122 00, P0123 00, P0220 00, P0221 00, P0222 00, P0223 00 or P0641 00 are not set.
    • The throttle position is less than or equal to 1% when the engine speed is less than or equal to 1 200 RPM.

OR

    • The throttle position is less than or equal to 20% when the engine speed is greater than 1 200 RPM.
    • The DTC runs continuously when the above conditions are met.

Conditions for Setting the DTC

P0106 00

The ECM detects that the MAP sensor pressure is not within range of the calculated pressure that is derived from the system of models for more than 0.5 s.

P0107 00

The ECM detects that the MAP sensor voltage is less than 0.05 V for greater than 5 s.

P0108 00

The ECM detects that the MAP sensor voltage is more than 4.9 V for greater than 5 s.

Action Taken When the DTC Sets

DTCs P0106 00, P0107 00 and P0108 00 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0106 00, P0107 00 and P0108 00 are Type B DTCs.

Diagnostic Aids

Note: Verify that the engine is in good mechanical condition before continuing with this diagnostic.

P0106 00

    • A skewed or stuck ECT sensor or IAT sensor will cause the calculated models to be inaccurate and may cause this DTC to run. Refer to Temperature Versus Resistance : IAT → ECT .
    • A skewed MAP sensor will cause the BARO value to be inaccurate. Use the scan tool and compare the BARO parameter at ignition ON to the Altitude vs. Barometric Pressure Table. Refer to Altitude Versus Barometric Pressure .
    • A skewed MAP sensor will also cause the first and second intake manifold models to disagree with the actual MAP sensor measurements. Use the scan tool and compare the MAP Sensor parameter to a known good vehicle, under various operating conditions.
    • Inspect for the following conditions:
       - Incorrect camshaft timing--Refer to Timing Belt Inspection : LDE, LED, LFJ, LXV, 2H0, LUW, LFH for the correct timing.
       - Worn piston rings--Refer to Engine Compression Test .

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EN 23738-A Mityvac

For equivalent regional tools, refer to Special Tools .

Circuit/System Verification
  1. Verify that the following DTCs are not set: P0642 00, P0643 00, P0652 00, or P0653 00.
    2. ⇒If any of the DTCs are set, refer to DTC P0642, P0643, P0652, or P0653 .
  2. Ignition ON, observe the scan tool MAP Sensor parameter. The reading should be between 80-120 kPa.
    3. ⇒If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
    ⇒If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.
  3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

  1. Ignition OFF, disconnect the harness connector at the B74 Manifold Absolute Pressure Sensor.
  2. Ignition OFF for 90 s, test for less than 5 Ω between the low reference circuit terminal A and ground.
    3. ⇒If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
  3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal C and ground.
    4. ⇒If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
    ⇒If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.
  4. Verify the scan tool MAP Sensor parameter is less than 10 kPa (1.45 PSI).
    5. ⇒If greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.
  5. Install a 3 A fused jumper wire between the signal circuit terminal B and the 5 V reference circuit terminal C. Verify the scan tool MAP Sensor parameter is greater than 121 kPa (17.55 PSI).
    6. ⇒If less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
  6. If all circuits test normal, test or replace the B74 Manifold Absolute Pressure Sensor.

Component Testing

Note: You must perform the Circuit/System Testing before proceeding with the Component Testing.

Dynamic Test

  1. Ignition OFF, engine does not run.
  2. Ignition ON.
  3. Inspect the scan tool MAP Sensor parameter and BARO parameter show both the actual ambient pressure.
    4. ⇒If the inspection tests normal, replace the B74 Manifold Absolute Pressure Sensor or the K20 Engine Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Manifold Absolute Pressure Sensor Replacement : 1.8L 2H0 and LUW
    • Engine Control Module Replacement for ECM replacement, setup and programming
   


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