DTC Descriptors
DTC P0107: Manifold Absolute Pressure (MAP) Sensor Circuit Low VoltageDTC P0108: Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
DTC P1106: Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage
DTC P1107: Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage
Diagnostic Fault Information
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
5-Volt Reference | P0107, P0405, P0452, P0462, P0532, P0641, P1107 | P0107 | P0107, P1107 | P0108, P0453, P0533, P0641 | P0107 |
MAP Sensor Signal | P0107 | P0107, P1107 | P0107 | P0108, P1106 | P0107 |
Low Reference | -- | P0108 | P0108, P1106 | -- | P0108 |
Typical Scan Tool Data
Circuit | Normal Range | Short to Ground | Open | Short to Voltage |
|---|---|---|---|---|
5-Volt Reference | -- | 10 kPa¹ 8 kPa² | 10 kPa¹ 8 kPa² | 104 kPa¹ 200 kPa² |
MAP Sensor Signal | 12-103 kPa¹ 10-198 kPa² | 10 kPa¹ 8 kPa² | 10 kPa¹ 8 kPa² | 104 kPa¹ 200 kPa² |
Low Reference | -- | -- | 80-103 kPa¹ 190 kPa² | -- |
¹ L26 | ||||
² L32 | ||||
Circuit/System Description
The manifold absolute pressure (MAP) sensor responds to changes in intake manifold pressure which gives an indication of the engine load. The MAP sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The powertrain control module (PCM) supplies 5 volts to the MAP sensor on the 5-volt reference circuit and provides a ground on the low reference circuit. The MAP sensor provides a signal to the PCM on the MAP sensor signal circuit which is relative to the pressure changes in the manifold.
L26
With low MAP, such as during idle or deceleration, the PCM should detect a low MAP sensor signal voltage. With high MAP, such as ignition ON, engine OFF or wide open throttle (WOT), the PCM should detect a high MAP sensor signal voltage. This MAP sensor will indicate pressure between 12-103 kPa. The MAP sensor is also used in order to calculate the barometric pressure (BARO) when the ignition switch is turned ON, with the engine OFF. The BARO reading may also be updated whenever the engine is operated at WOT. The PCM monitors the MAP sensor signal for voltage outside of the normal range.
L32
With low MAP, such as during idle or deceleration, the PCM should detect a low MAP sensor signal voltage. With high MAP such as WOT, the PCM should detect a high MAP sensor signal voltage. This MAP sensor will indicate pressure between 10-198 kPa. The PCM monitors the MAP sensor signal for voltage outside of the normal range.
Conditions for Running the DTC
P0107 or P1107
| • | DTCs P0068, P0120, P0220, P1516, P2101, P2108, P2120, P2125, P2135, or P2138 are not set |
| • | The ignition is ON. |
| • | The throttle angle is more than 0 percent, if the engine speed is less than 1,000 RPM. |
| OR |
| • | The throttle angle is more than 10 percent, if the engine speed is more than 1,000 RPM. |
P0108 or P1106
| • | DTC P0068, P0120, P0220, P1516, P2101, P2108, P2120, P2125, P2135, P2138 are not set. |
| • | The engine has been running for a length of time that is determined by the startup coolant temperature. The length of time ranges from 5.5 minutes at less than -30°C (-22°F) to 10 seconds at more than +30°C (+86°F). |
| • | The throttle angle is less than 2 percent when the engine speed is less than 3,000 RPM. |
| OR |
| • | The throttle angle is more than 30 percent when the engine speed is more than 3,000 RPM. |
Conditions for Setting the DTC
P0107
| • | The control module detects that the MAP sensor voltage is less than 0.1 volt for more than 3 seconds. |
| • | This diagnostic runs continuously. |
P0108
| • | The control module detects that the MAP sensor voltage is more than 4.3 volts for more than 3 seconds. |
| • | This diagnostic runs continuously. |
P1106
| • | The control module detects that the MAP sensor voltage is intermittently more than 4.3 volts. |
| • | This diagnostic runs continuously. |
P1107
| • | The control module detects that the MAP sensor voltage is intermittently less than 0.1 volt. |
| • | This diagnostic runs continuously. |
Action Taken When the DTC Sets
P0107 and P0108
| • | The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails. |
| • | The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records. |
P1106 and P1107
| • | The control module stores the DTC information into memory when the diagnostic runs and fails. |
| • | The malfunction indicator lamp (MIL) will not illuminate. |
| • | The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records. |
| • | The driver information center, if equipped, may display a message. |
Conditions for Clearing the DTC
P0107 or P0108
| • | The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail. |
| • | A current DTC, Last Test Failed, clears when the diagnostic runs and passes. |
| • | A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic. |
| • | Clear the MIL and the DTC with a scan tool. |
P1106 or P1107
| • | A current DTC Last Test Failed clears when the diagnostic runs and passes. |
| • | A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic. |
| • | Clear the DTC with a scan tool. |
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Special Tool Reference
J 23738-A Mityvac
Circuit/System Verification
Important: Verify that the engine is in good mechanical condition before continuing with this diagnostic.
- If P0641 or P0651 are set. Refer to Diagnostic Trouble Code (DTC) List - Vehicle.
- Verify the integrity of the entire air induction system by inspecting for the following conditions:
- Verify that restrictions do not exist in the MAP sensor port or vacuum source.
- Verify that restrictions do not exist in the exhaust system. Refer to Restricted Exhaust.
- The barometric pressure (BARO) that is used by the PCM to calculate the air flow models is initially based on the MAP sensor at ignition ON. When the engine is running, the PCM will continually update the BARO value near WOT using the MAP sensor and a calculation. A skewed MAP sensor will cause the BARO value to be inaccurate. Determine the current vehicle testing altitude. Ignition ON, observe the scan tool BARO Sensor parameter. Compare the parameter 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.
| • | 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. |
Circuit/System Testing
Important: All electrical components and accessories must be turned OFF, and allowed to power down.
- Ignition OFF, disconnect the harness connector at the MAP sensor.
- Ignition OFF, test for less than 5 ohm of resistance between the low reference circuit terminal A and ground.
- Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal C and ground.
- Verify the scan tool MAP parameter is less than 12 kPa (L26), 10 kPa (L32).
- 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 103 kPa (L26), 199 kPa (L32).
- If all circuits test normal, test or replace the MAP sensor.
| ⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the PCM. |
| ⇒ | 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 PCM. |
| ⇒ | If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the PCM. |
| ⇒ | If greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the PCM. |
| ⇒ | 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 PCM. |
Component Testing
- Turn ON the ignition, with the engine OFF, and remove the MAP sensor.
- Install a 3A fused jumper wire between the 5-volt reference circuit terminal C and the corresponding terminal of the MAP sensor.
- Install a jumper wire between the low reference circuit terminal A of the MAP sensor and ground.
- Install a jumper wire at terminal B of the MAP sensor.
- Connect a DMM between the jumper wire from terminal B of the MAP sensor and ground.
- Install the J 23738-A to the MAP sensor vacuum port. Slowly apply vacuum to the sensor while observing the voltage on the DMM. The voltage should vary between 0-5.2 volts, without any spikes or dropouts.
| ⇒ | If the voltage is not within the specified range or is erratic, replace the MAP sensor. |
Repair Instructions
Repair Verification
