Changed maf sensor barometric sensor air throttle body
P2076 is Trouble code for the intake manifold tuning valve. You need to check power supply and signal to connectors. Check also the wirings. You can also monitor from the scan tool regarding the value of the position sensor of intake manifold tuning valve and the value commanded by the ecm. Sometimes this valve get stuck and will not respond to ecm controls. ?
SOURCE: 1997 Toyota Camry code P0171
ita a little black box with 5 wires plug, between air filter and throttle, but try to reset maybe was a momentany failure,disconnect the negative battery terminal few minutes
SOURCE: can I clean my Maf sensor and throttle body myself
Yes it will help car run better. Take off any hose that goes to card so that you can see down throttle bore. Start car. Grab throttle linkage and figure out how to move it so that you can make the engine go faster. Begine to spray inside throttle body using little red hose that came with carb cleaner. While you are spraying the engine will try to cut out move the throttle linkage to speed up the engine so it won't cut out. Keep spraying all around inside and outside throttle bore.
SOURCE: Chevy truck '02 surges between 45 and 55 mph
you should change the tps( throtal position sensor) this can cause that problem
SOURCE: 2002 chevy blazer codes 443 449 i replaced the maf...
p0443 is evaporative emission control system, purge control curcuit malfunction, p0449 is emission control system, vent control curcuit malfunction. p0449 is often a filler cap problem on fuel tank. try tightening cap
SOURCE: 2003 GMC Sierra Has recently developed
You never replace anything, on a Wishing,Hoping,Pushing,Poking,diagnostic approach
You learn the vehicles Systems,Test,then Replace,if you have a failed component.
Work on the Misfire Issues.
Then you lean O2 Codes will go away.
Not a the plugs.
Think lean---Vacuum leaks,EGR Valve leak,EVAP System leaks,anything with a hose that lets air into the intake system.
Exhaust System leaks,near sensors
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The barometric pressure (BARO)
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The manifold absolute pressure (MAP)
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The intake air temperature (IAT)
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The engine RPM
P0121
The predicted air flow and the predicted MAP combined are outside a calibrated range for more than 3 seconds.
Circuit/System Testing
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Inspect thoroughly for any type of leak or restriction
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Air leaks at throttle body mounting area and intake manifold sealing surfaces
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Throttle body for dirt, debris, and coking--Refer to Throttle Body Cleaning.
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Increase the engine speed slowly to 3,000 RPM, then back to idle.
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Exit from the snapshot and review the data.
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Observe the Mass Air Flow (MAF) Sensor parameter frame by frame with a scan tool. The MAF sensor g/s should change smoothly and gradually as the engine speed is increased and is returned to idle.
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If the MAF sensor g/s does not change smoothly and gradually as the engine speed is increased and is returned to idle, refer to DTC P0101 or P1101.
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Broken throttle shaft
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Any throttle body damage
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If any of these conditions exist, replace the throttle body assembly.
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