Question about Dodge Cars & Trucks
Checked wireng harness, replaced map , baro, and throttle valve, code still persist. replaced the turbo speed sensor, nothing, no boost leakes manifold absolute pressure shuts my throttle off for 3 secs then back in business for a short period.
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Posted on Jan 02, 2017
this a map sensor, probably just need the sensor replaced, it measurese intake vaccum and adjusts air/fuel mixture accordingly
Posted on Oct 07, 2009
Testimonial: "MANY THANKS TO HONDABOY 47. SPOT - ON. PROBLEM SOLVED!"
the mapp & barometric sensors aren't doing the job in performing the correct mixture of hydrocarbons to pass through your exhaust
Posted on Jan 31, 2010
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The barometric pressure (BARO)
The manifold absolute pressure (MAP)
The intake air temperature (IAT)
The engine RPM
P0121 The predicted air flow and the predicted MAP combined are outside a calibrated range for more than 3 seconds.
Inspect thoroughly for any type of leak or restriction
Air leaks at throttle body mounting area and intake manifold sealing surfaces
Throttle body for dirt, debris, and coking--Refer to Throttle Body Cleaning.
Increase the engine speed slowly to 3,000 RPM, then back to idle.
Exit from the snapshot and review the data.
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.
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.
Broken throttle shaft
Any throttle body damage
If any of these conditions exist, replace the throttle body assembly.
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