Spark

DTC P0106

The manifold absolute pressure (MAP) sensor responds to pressure changes in the inlet manifold. The pressure changes occur based on the engine load. The engine control module (ECM) supplies 5V to the MAP sensor on the 5V reference circuit. The ECM provides an ground on the low reference circuit. The MAP sensor provides a signal to the ECM on the MAP sensor signal circuit which is relative to the pressure changes in the manifold. The ECM detects a low signal voltage at a low MAP, such as during an idle or a deceleration. The ECM detects a high signal voltage at a high MAP, such as the ignition is ON, with the engine OFF, or at a wide open throttle (WOT). The MAP sensor is also used to determine the barometric pressure (BARO).

DTC P0107, P0108, P0112, P0113, P0117, P0118, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0300, P0301, P0302, P0303, P0304, P0335, P0336, P0351, P0352, P0353, P0354, P0458, P0459, P0502, P0562, P0563, or P2110 is not set.

Test 1 - Decel. mode

Test 2 - Power mode

The ECM detects that the MAP reading is not within the expected high and low limits based on the engine speed and the throttle position.

DTC P0106 is a Type E DTC.

DTC P0106 is a Type E DTC.

A high resistance condition in the MAP sensor circuits will cause this DTC.

Schematic Reference

Engine Controls Schematics : Siemens ECM - LPG with LCP → Siemens ECM - Gas without FX3 or LCP → Delphi ECM - FX3

Connector End View Reference

Component Connector End Views

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information.

Special Tools

J 35555 Metal Mity-Vac

1. Ignition ON, verify that DTC P0107 or P0108 is not set.

⇒	If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle

2. Verify none of the following conditions exist:

•	Leaking exhaust gas recirculation (EGR) valve.

•	Restricted exhaust--Refer to Restricted Exhaust .

•	Engine mechanical condition--For example, low compression or incorrect timing chain installation. Refer to Symptoms - Engine Mechanical .

3. Determine the current vehicle testing altitude. Compare the MAP sensor pressure parameter to the reading in the Altitude Versus Barometric Pressure table. The MAP sensor pressure parameter should be within the specified range indicated in the table.

Note: In extreme cold weather conditions ice may form in the vacuum source to the MAP sensor and may set a DTC. Inspect the MAP sensor and the vacuum source for ice, moisture, or other restrictions.

4. Start the engine, verify that the scan tool MAP sensor pressure parameter changes while starting the engine.
5. Engine running, verify that the scan tool MAP Sensor pressure parameter is between 26-52 kPa.
6. Snap the throttle while observing the scan tool MAP sensor pressure parameter. The MAP sensor pressure parameter should change rapidly when the throttle position changes.
7. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

1. Verify the integrity of the entire air induction system by inspecting for the following conditions:

•	Any damaged components

•	Loose or improper installation

•	An air flow restriction

•	Any vacuum leak

•	Improperly routed vacuum hoses

•	In cold climates, inspect for any snow or ice buildup

•	Verify that restrictions do not exist in the MAP sensor port or vacuum source.

2. Ignition OFF, disconnect the harness connector at the B74 manifold absolute pressure (MAP) sensor.
3. Ignition OFF for 1 minute, test for less than 5 Ω between the low reference circuit terminal 2 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 K20 ECM.

4. Ignition ON, test for 4.8-5.2V between the 5V reference circuit terminal 1 and ground.

⇒	If less than the specified range, test the 5V reference circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K20 ECM.

⇒	If greater than the specified range, test the 5V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

5. Verify the scan tool MAP sensor parameter is less than 0.5V.

⇒	If greater than the specified range, test the signal circuit terminal 3 for a short to voltage. If the circuit tests normal, replace the K20 ECM.

6. Install a 3A fused jumper wire between the signal circuit terminal 3 and the 5V reference circuit terminal 1. Verify the scan tool MAP sensor parameter is greater than 4.5V.

⇒	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 K20 ECM.

7. If all circuits test normal, test or replace the B74 MAP sensor.

1. Ignition OFF, disconnect the harness connector at the HO2S.
2. Test for 3-23 Ω between the control terminal and the ignition terminal of the appropriate HO2S.

•	Control terminal 2 and ignition terminal 4 of the B52A HO2S1

•	Control terminal 2 and ignition terminal 4 of the B52B HO2S2

⇒	If not within the specified range, replace the HO2S sensor.

The ignition ON, engine OFF MAP sensor scan tool value should decrease within ± 4 kPa by the amount of vacuum applied with the J 35555 metal mity-vac or equivalent. For example, at 92 kPa, the MAP sensor scan tool reading should be between 71-79 kPa with 5 in Hg (17 kPa) of vacuum applied to the sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.