Question about 1992 Mitsubishi Pajero
Check wiring for open circuit,remove map sensor and test ,mount map sensor back
Posted by Anonymous on
I'm not sure I understand your question. When I first read it I thought you were saying you had an error code that the engine idle is low, but the error code you've given is for a MAP sensor problem which you mentioned in your post also. I'm going to guess that you've observed the low idle yourself, and when you ran the diagnostics the engine computer was complaining of a bad MAP sensor signal. This is triggered when the engine computer sees a change in another sensor that should correlate with a certain change in the MAP sensor, but the MAP sensor signal doesn't change as expected. Idle problems are a possible symptom of a bad MAP sensor, so this is not unreasonable. What your engine is telling you is that you should check the MAP sensor and its related wiring and hose connections to try to find your problem. If you fix the problem with the MAP sensor then your idle may start working properly again.
Posted on Feb 11, 2015
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
May 20, 2018 | GMC Cars & Trucks
Apr 24, 2013 | Mitsubishi Montero Cars & Trucks
Jul 23, 2011 | 2003 Chevrolet TrailBlazer
Jun 17, 2011 | 1995 Cadillac DeVille
Nov 06, 2017 | 2003 Chevrolet TrailBlazer
Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction
The MAP (Manifold Absolute Pressure) sensor is part of the fuel management system. It reacts to changes in engine manifold pressure. The PCM (Powertrain Control Module) monitors the MAP sensor continually to properly run the engine. Changes in engine load require changes in the amount of fuel injected, and timing of the ignition system, etc. An engine under load has more manifold pressure(or less vacuum) than an engine that is coasting. As the load changes, the MAP sensor voltage signal to the PCM changes accordingly. To check the MAP sensor operation, though, the PCM watches other sensors to verify that the MAP sensor is working properly.
For example, the PCM compares the TPS (Throttle Position Sensor) signal to the MAP signal to verify the MAP signal isn't "sticking". If the PCM doesn't see a MAP sensor change immediately follow a change in the throttle pedal sensor, it knows there is a problem with the MAP sensor and sets P0105. Or, if the PCM notices that the TPS indicates the engine is under load, but the MAP signal indicates that the engine is "coasting" it, again, knows there is a problem with the MAP sensor or TPS and sets P0105.
OBD-Codes.com on Facebook
Symptoms of a P0105 check engine light code may include:
A P0105 DTC could be caused by:
Using a scanner or code reader, turn the ignition on and engine OFF; what does the MAP sensor voltage read? It should be about 4 Volts for sea level. If you are at a higher altitude, it should decrease about half a volt or so for each 1,000 ft. of altitude (this will vary from model to model) Or if you have a separate MAF (Mass air flow) sensor on your vehicle, they are usually equipped with a Barometric pressure reading. If so, the Baro reading should match the MAP reading (they both measure ambient air pressure). If they're roughly equal, then, check for Freeze Frame data of the MAP sensor (if available).
NOTE: Freeze Frame data is the PCM recording a fault when it happens. It captures the readings of the various PIDS (parameter identifiers)available to troubleshoot what happened. It's like a recording of the problem as it happened. At idle a typical MAP sensor Voltage reading should be about a volt, and at WOT (wide open throttle) it should approach 4.5 to 5 Volts. As for the TPS, at idle, the voltage reading is about 1 Volt or less. As the throttle is opened the reading will increase to 4.5 Volts at WOT. Do the two readings make sense? For example, if the TPS reading on Freeze Frame data shows 2.5 Volts (indicating partial throttle) does the MAP sensor indicate a reading that isn't at either extreme? Using the Freeze Frame data (if available) compare the MAP reading to the TPS when the problem occurred. This can help you identify what happened
If you have no access to Freeze Frame data then check if the MAP sensor voltage changes when you apply vacuum to it. You can do this by mouth or a vacuum pump. The voltage should increase as you apply vacuum. If the reading doesn't change as you apply vacuum, make sure there are no obstructions in the hose to the sensor. If the hose is clear, the MAP sensor is usually bad, but it doesn't rule out the following from causing the problem: Does the MAP sensor appear to be stuck at less than .5 Volts? Then:
NOTE: This code shouldn't set if the MAP is stuck at extremely low voltage, however, I'm adding it in because there's no way to know for certain for which vehicles a low voltage condition may set a P0105.
Does the MAP sensor appear to be stuck at full 4.5 voltage? Then:
Feb 27, 2011 | Jaguar X-Type Cars & Trucks
Jan 24, 2011 | 2001 Hyundai Elantra
Jan 03, 2011 | 2003 Toyota Matrix
Jul 09, 2010 | 2002 GMC Envoy
Feb 24, 2009 | 1999 Mitsubishi Montero
392 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: