What did you use to read this code with ? No P0105 code for this vehicle .
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DTC P0106
The manifold absolute pressure (MAP) sensor responds to pressure changes in the intake manifold. The pressure changes occur based on the engine load. The MAP sensor has the following circuits:
• A 5-volt reference circuit
• A low reference circuit
• A MAP sensor signal circuit
The powertrain control module (PCM) supplies 5 volts to the MAP sensor on the 5-volt reference circuit. The PCM also 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. The PCM should detect a low signal voltage at a low MAP, such as during an idle or a deceleration. The PCM should detect 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 in order to determine the barometric pressure (BARO). This occurs 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.
The PCM calculates a predicted value for the MAP sensor based on throttle position (TP) and engine speed. The PCM then compares the predicted value to the actual MAP sensor signal. If the PCM detects that the MAP sensor signal is not within the predicted range, DTC P0106 sets.
Inspect for the following conditions:
• Disconnected, damaged, or incorrectly routed vacuum hoses
• Missing or damaged manifold absolute pressure (MAP) sensor seal
• Restrictions in the MAP sensor vacuum source
• Intake manifold vacuum leaks
Did you find and correct the condition?
This code does not tell U the MAP sensor is bad , do yourself a favor an take it to a qualified repair shop.
SOURCE: Where is the air mass sensor on a 2003 GMC envoy xl v8
It is in the air tube between the air filter and the throttle body, it usually has a two wire plug that is plugged into it.
The oil pressure drop indicates more problems.
Oil pressure drops to zero at idle on 2002 GMC Envoy after ...
www.fixya.com/cars/t7880379-oil_pressure_drops_zero_idle_2002_gmc Jan 18, 2011 - You could have three possable problems that I can think of. 1) Your oilviscosity is too low and you need to change it to a higher level. A 5w/30 .
SOURCE: Where is mass air flow sensor located on 2005 gmc envoy?
looking at the engine to the left /passenger side front will see the air filter housing and a large black tube the m.a.f. is mounted inline with the tube next to the air filter box
How To Install Repalce MAF Mass Air Flow Sensor v8 5 3L GMC Envoy and XL...
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