P0107 After 408 install?
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From: Seattle Wa
P0107 After 408 install?
Last night after a WOT blast to the top of 4th my check engine light came on so i pulled the codes and it was P0107 manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage -A and P0154 Heated Oxygen Sensor (HO2S) Circuit Insufficient Activity Bank 2 Sensor 1-A
im not to worried about the 0154 code i am probally due for a set of front o2s but the 0107. Is this something that is missing in my tune. I have a FAST intake on my 408 with a 240/244 shaft. Is the amount of vac this thing drawing causing my computer to flip?? Im gonna talk to my tuner tomorow at the track just wanted some ideas of where to start. I have the MAP sensor RTVed in because the fit into that hole sucked so i am pretty sure i dont have a vac leak...
im not to worried about the 0154 code i am probally due for a set of front o2s but the 0107. Is this something that is missing in my tune. I have a FAST intake on my 408 with a 240/244 shaft. Is the amount of vac this thing drawing causing my computer to flip?? Im gonna talk to my tuner tomorow at the track just wanted some ideas of where to start. I have the MAP sensor RTVed in because the fit into that hole sucked so i am pretty sure i dont have a vac leak...
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Here is p0107
CIRCUIT DESCRIPTION
The Manifold Absolute Pressure (MAP) sensor is mounted to the rear of the intake manifold. The MAP sensor measures the pressure changes within the intake manifold which is an indication of the engine load. The MAP sensor has a 5.0 volt reference, a ground, and a signal circuit.
The MAP sensor contains a diaphragm which changes the sensors resistance based on pressure. When the manifold pressure is low (high vacuum) the sensor output voltage is low. When the manifold pressure is high (low vacuum) the sensor output voltage is high.
The MAP sensor voltage (depending on altitude) can range from 1.0-1.5 volts at idle (high vacuum) to 4.0-4.9 volts at wide open throttle (low vacuum). When the PCM senses a signal voltage lower than the normal operating range of the sensor, this DTC will set.
CONDITIONS FOR RUNNING THE DTC
No TP sensor DTCs set.
The engine is operating.
The TP sensor angle is 0 percent when engine speed is less than 1200 RPM . Or
The TP sensor angle is less than 20 percent when engine speed is greater than 1200 RPM .
CONDITIONS FOR SETTING THE DTC
The MAP is less than 0.10 volts .
All conditions met for greater than 4.0 seconds .
ACTION TAKEN WHEN THE DTC SETS
The PCM illuminates the Malfunction Indicator Lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The PCM records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the PCM stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the PCM records the operating conditions at the time of the failure. The PCM writes the conditions to the Freeze Frame and updates the Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC
The PCM turns the Malfunction Indicator Lamp (MIL) OFF after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A last test failed (current DTC) clears when the diagnostic runs and does not fail.
A History DTC clears after 40 consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures.
Use a scan tool in order to clear the MIL/DTC.
DIAGNOSTIC AIDS :
IMPORTANT:
Remove any debris from the PCM/TAC module connector surfaces before servicing the PCM/TAC module. Inspect the PCM/TAC module connector gaskets when diagnosing/replacing the modules. Ensure that the gaskets are installed correctly. The gaskets prevent contaminate intrusion into the PCM/TAC modules.
For any test that requires probing the PCM or a component harness connector, use the Connector Test Adapter Kit J 35616-A. Using this kit prevents damage to the harness/component terminals. Refer to Using Connector Test Adapters in Diagrams.
The PCM 5.0 volt reference circuits are internally connected within the PCM. If all the MAP sensor circuits are OK, inspect the Engine Oil Pressure sensor circuits for malfunctions.
For an intermittent, refer to Symptoms. See: Diagnostic Information and Procedures\Symptoms
Some folks have found:
It was indeed the MAP (manifold absolute pressure) sensor. During the header installation, we had to jack the engine on the driver side in order to accomodate the headers. The sensor became disconnected from the plug and caused the code and check engine to come on. Getting to the sensor was a challenge. There is very little room to work since it sits all the way in the back on top of the intake manifold.
orits loose...........
or
http://forums.corvetteforum.com/show...um_id=1&arch=1
CIRCUIT DESCRIPTION
The Manifold Absolute Pressure (MAP) sensor is mounted to the rear of the intake manifold. The MAP sensor measures the pressure changes within the intake manifold which is an indication of the engine load. The MAP sensor has a 5.0 volt reference, a ground, and a signal circuit.
The MAP sensor contains a diaphragm which changes the sensors resistance based on pressure. When the manifold pressure is low (high vacuum) the sensor output voltage is low. When the manifold pressure is high (low vacuum) the sensor output voltage is high.
The MAP sensor voltage (depending on altitude) can range from 1.0-1.5 volts at idle (high vacuum) to 4.0-4.9 volts at wide open throttle (low vacuum). When the PCM senses a signal voltage lower than the normal operating range of the sensor, this DTC will set.
CONDITIONS FOR RUNNING THE DTC
No TP sensor DTCs set.
The engine is operating.
The TP sensor angle is 0 percent when engine speed is less than 1200 RPM . Or
The TP sensor angle is less than 20 percent when engine speed is greater than 1200 RPM .
CONDITIONS FOR SETTING THE DTC
The MAP is less than 0.10 volts .
All conditions met for greater than 4.0 seconds .
ACTION TAKEN WHEN THE DTC SETS
The PCM illuminates the Malfunction Indicator Lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The PCM records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the PCM stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the PCM records the operating conditions at the time of the failure. The PCM writes the conditions to the Freeze Frame and updates the Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC
The PCM turns the Malfunction Indicator Lamp (MIL) OFF after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A last test failed (current DTC) clears when the diagnostic runs and does not fail.
A History DTC clears after 40 consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures.
Use a scan tool in order to clear the MIL/DTC.
DIAGNOSTIC AIDS :
IMPORTANT:
Remove any debris from the PCM/TAC module connector surfaces before servicing the PCM/TAC module. Inspect the PCM/TAC module connector gaskets when diagnosing/replacing the modules. Ensure that the gaskets are installed correctly. The gaskets prevent contaminate intrusion into the PCM/TAC modules.
For any test that requires probing the PCM or a component harness connector, use the Connector Test Adapter Kit J 35616-A. Using this kit prevents damage to the harness/component terminals. Refer to Using Connector Test Adapters in Diagrams.
The PCM 5.0 volt reference circuits are internally connected within the PCM. If all the MAP sensor circuits are OK, inspect the Engine Oil Pressure sensor circuits for malfunctions.
For an intermittent, refer to Symptoms. See: Diagnostic Information and Procedures\Symptoms
Some folks have found:
It was indeed the MAP (manifold absolute pressure) sensor. During the header installation, we had to jack the engine on the driver side in order to accomodate the headers. The sensor became disconnected from the plug and caused the code and check engine to come on. Getting to the sensor was a challenge. There is very little room to work since it sits all the way in the back on top of the intake manifold.
orits loose...........
or
http://forums.corvetteforum.com/show...um_id=1&arch=1
