what causes this code
07-02-2008, 08:16 PM
#1
Senior Member
Thread Starter
what causes this code
well ive read up on this and i dont think its a big deal but i threw a p0171 i believe it is tonight....the car is stock, about a thousand miles overdue for an oilchange, and my breather line to my intake from the valve cover is broke so i removed it and taped it off/ put a breather filter on. and o yea running on sheetz gas plus i had the maf out of the car for a bit.
Last edited by mike25; 07-03-2008 at 02:45 AM.
07-02-2008, 10:34 PM
#3
Senior Member
Thread Starter
07-03-2008, 12:04 AM
#7
Senior Member
Join Date: 12-18-07
Location: Methuen, MA
Posts: 899
Likes: 0
Received 0 Likes
on
0 Posts
DTC P0107
CIRCUIT DESCRIPTION
The manifold absolute pressure (MAP) sensor that resides in the engine intake manifold is integrated with the intake air temperature (IAT) sensor 2. The purpose of this integrated sensor is to measure the following:
* The atmospheric pressure and the vacuum or the reduced pressure that exists under different operating conditions in the engine intake manifold
* The supercharged air pressure that exists under high load or wide open throttle conditions in the engine intake manifold
* The IAT 2 after the supercharger and the intercooler as it enters the engine intake manifold
* The IAT 2 after the supercharger bypass valve and the intercooler as it enters the engine intake manifold
The MAP/IAT sensor 2 has the following types of circuits:
* A powertrain control module (PCM) supplied and regulated MAP 5-volt reference circuit
* A PCM supplied ground for the low reference circuit that is shared by the MAP and the IAT sensor 2
* A MAP sensor signal circuit that supplies a voltage input to the PCM
* A PCM supplied 5-volt , IAT signal circuit
The diaphragm within the MAP sensor responds to all of the various pressure changes in the intake manifold, and provides a signal voltage to the PCM on the signal circuit, relative to those pressure changes.
The PCM monitors the MAP sensor signal for voltage that is outside of the normal range of a properly operating sensor. If the PCM detects a MAP sensor signal voltage that is excessively low, DTC P0107 sets.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0107 Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
CONDITIONS FOR RUNNING THE DTC
* DTCs P0120, P0121, P0220, P2135 are not set.
* The ignition is ON, or the engine is cranking or running.
* The TP Indicated Angle parameter is more than 0 percent , when the engine speed is less than 1,100 RPM .OR
* The TP Indicated Angle parameter is more than 10 percent , when the engine speed is more than 1,100 RPM .
* DTC P0107 runs continuously when the above conditions are met.
CONDITIONS FOR SETTING THE DTC
The PCM detects that the MAP sensor signal voltage is less than 0.1 volts for more than 2 seconds .
ACTION TAKEN WHEN THE DTC SETS
* 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.
you could need a new MAP sensor, or it could be a fluke.
CIRCUIT DESCRIPTION
The manifold absolute pressure (MAP) sensor that resides in the engine intake manifold is integrated with the intake air temperature (IAT) sensor 2. The purpose of this integrated sensor is to measure the following:
* The atmospheric pressure and the vacuum or the reduced pressure that exists under different operating conditions in the engine intake manifold
* The supercharged air pressure that exists under high load or wide open throttle conditions in the engine intake manifold
* The IAT 2 after the supercharger and the intercooler as it enters the engine intake manifold
* The IAT 2 after the supercharger bypass valve and the intercooler as it enters the engine intake manifold
The MAP/IAT sensor 2 has the following types of circuits:
* A powertrain control module (PCM) supplied and regulated MAP 5-volt reference circuit
* A PCM supplied ground for the low reference circuit that is shared by the MAP and the IAT sensor 2
* A MAP sensor signal circuit that supplies a voltage input to the PCM
* A PCM supplied 5-volt , IAT signal circuit
The diaphragm within the MAP sensor responds to all of the various pressure changes in the intake manifold, and provides a signal voltage to the PCM on the signal circuit, relative to those pressure changes.
The PCM monitors the MAP sensor signal for voltage that is outside of the normal range of a properly operating sensor. If the PCM detects a MAP sensor signal voltage that is excessively low, DTC P0107 sets.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0107 Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
CONDITIONS FOR RUNNING THE DTC
* DTCs P0120, P0121, P0220, P2135 are not set.
* The ignition is ON, or the engine is cranking or running.
* The TP Indicated Angle parameter is more than 0 percent , when the engine speed is less than 1,100 RPM .OR
* The TP Indicated Angle parameter is more than 10 percent , when the engine speed is more than 1,100 RPM .
* DTC P0107 runs continuously when the above conditions are met.
CONDITIONS FOR SETTING THE DTC
The PCM detects that the MAP sensor signal voltage is less than 0.1 volts for more than 2 seconds .
ACTION TAKEN WHEN THE DTC SETS
* 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.
you could need a new MAP sensor, or it could be a fluke.
Last edited by EdCobaltSS; 07-03-2008 at 12:04 AM. Reason: Automerged Doublepost
07-03-2008, 10:01 PM
#8
Senior Member
Join Date: 06-22-08
Location: PA
Posts: 1,320
Likes: 0
Received 0 Likes
on
0 Posts
well ive read up on this and i dont think its a big deal but i threw a p0171 i believe it is tonight....the car is stock, about a thousand miles overdue for an oilchange, and my breather line to my intake from the valve cover is broke so i removed it and taped it off/ put a breather filter on. and o yea running on sheetz gas plus i had the maf out of the car for a bit.
Anyway 0171 is either a maf code or a throttle code but in true terms it says "system is too lean". Usually people get it with a k&n intake and/or filter (oiled filter)...usually 0171's best buddy 1182 tags along for the ride.
Thread
Thread Starter
Forum
Replies
Last Post
OrangeCoba
Problems/Service/Maintenance
0
09-25-2015 06:06 PM