Question about 2006 Isuzu i-280

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Engine is running like a plug wire is off -codes say map sensor, crk sensor, vacuum leak - did not shift into high quite right for two weeks leading up to this - plugs, wires ok - where is map sensor and crk sensor. thank you Greg w.

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These sensors are in you vacume lines. You can tell which ones because they are thin black hoses with mulitple extensions on them. You are looking for components with electrical wiring running form the hoses to the vehicles "brain".

Posted on Feb 22, 2010

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2014 jeep compass codes po171 and p2173 and limp mode


did you push the reset button on the scan tool first then drive?
or are doing the very hard, DRIVE till it clears, good luck there.
which engine? see end for choices
short Answer:
got a vacuum leak.

Long answer:
no other codes? why change the 02? front one is Air/fuel 02.
not rear.
the ECU is telling you VACUUM leak, and lean.
you failed to say what sensor you changed,? nor engine in car.
all cars have at least 2 OXY sensors, 02.
limp mode, is set, any time major sensors fail.
on a race car with pro EFI system a major sensor fails
and engine dies, no limp-in mode.
on this production car, it has limp-in allowing the driver
drive car but at reduced power, (not getting stranded can save your life, no?)
so that is what it is,
and lean to that a code is not telling you to replace apart
the code is for you technician to do the tests stated in the book
to find true cause, can be, false code, bad wires, bad connectors and sure the sensors.
you shot gunned it and now get to learn how to do this correctly
maybe?
to understand codes, read the real jeep book , not web rumors of off some FORD. or chebby.
0171 (old federal code for. fueling is LEAN.
2173 (this is jeep factory code, only P2 = factory
and means.
i think this is the mK49 jeep, a Mitsubishi GS based jeep.
not really a jeep,
makes finding accurate data for me harder.
===================qoutes from FSM)================
here is 2173 verbatum
P2173-High Airflow/Vacuum Leak Detected (Slow Accumulation)P2173-HIGH AIRFLOW/VACUUM LEAK DETECTED (SLOW ACCUMULATION) For a complete wiring diagram, refer to the Wiring Information.
When Monitored: Ignition on and engine running with no MAP Sensor DTCs.Set Condition:
A large vacuum leak has been detected or the signal voltage for both TP Sensors is stuck at 2.5 Volts and calculated MAP is less than the Gas Flow Adaptation value. (comment note the TP angles and MAP DO NOT AGREE !!!!!)

One trip fault; the DTC will set within five seconds. ETC light will flash.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)
Diagnostic Test
ACTIVE DTC
NOTE Diagnose and repair any ETC, MAP Sensor, VSS, or 5-Volt supply circuit DTCs before continuing. Start the engine and allow it to reach normal operating temperature.
===================end qoutes====================
so what would you do.?
you would find out why the map sensor reads wrong
and why there is this huge vacuum air leak.
this is EFI basics.
if the MAP and my hand vacuum gauge agrees?
then the MAP is not telling lies(clogged)
so it's a real vacuum leak , I bet it is...
google finding engine vacuum leaks
or youtube that.
hoses fell off , is #1 on a 2014 car, new.
seems like STEP ONE.
The 02 is not bad,
the PCM told you this.
MAP sees huge vacuum leak and engine runs lean.
------------------speed density 101 EFi-------
what is a MAP?
its a baro sensor
what is a baro, it measures, (vacuum)
in science a barometer, measures, (here) absolute pressure,with engine off, the baro reads
14.7 psi, (that is the air pressure at sea level)
or as they say in europe 1 bar.
the engine starts and engine vacuum is about 20"HG
vacuum
the EFI takes the MAP sensor readings
then using tables converts this to air flow in to engine then computes, that to fuel injection rates
this is how all jeeps run.
its MAP based system. on most or all jeeps
(usa, no idea how a tigershark fiat engine runs in europe jeeps)

when the map is dead, or if the leak is so bad that the EFI thinks(sic) its bad, or can't believe it?
the ECU goes to limphome mode
this is so the engine does not go hyper LEAN
and burn up engine head valves and fiends
it's protect your engine. let. it.

THE ECU IS TAD SMARTER here.
smarter that the average bear.?
it sees throttle angles radically different than the map and know for sure, THAT IS NOT RIGHT.
and drops to LIMP.
this tells you all you need to know,..on topic
besides, push scan tool reset. drive see if the problem is cured.

which engine248fa4f8-9dba-4786-97de-d7b899bd70c9.jpg

Oct 23, 2016 | 2014 Jeep Compass

3 Answers

Engine runs rough and stalls sets a p0068 code on a 05 dodge durango


P0068-MAMFQLD PRESSURE/THROTTLE POSITION CORRELATION
' Image
Theory of Operation
This DTC sets when an unexpected high intake manifold air flow condition exists that
can lead to increased engine speed and puts the NGC into a High Air flow Protection
limiting mode. The High Air flow Protection feature includes RPM limits for when a
Throttle and or MAP sensor limp-in fault is present.
When Monitored
During all drive modes.
Set Condition
If vacuum drops below 1.5Hg with engine RPM greater than 2000 RPM and closed
throttle. One Trip Fault. Three good trips to turn off the MIL.
Possible Causes
-VACUUM LEAK
-RESISTANCE IN THE (FS56) 5-VOLT SUPPLY CIRCUIT
-(FS56) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
-RESISTANCE IN THE (Kl) MAP SIGNAL CIRCUIT
-(Kl) MAP SIGNAL CIRCUIT SHORTED TO GROUND
-RESISTANCE IN THE (FS55) 5-VOLT SUPPLY CIRCUIT
-(FS55) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
-RESISTANCE IN THE (K22) TP SENSOR NO. 1 SIGNAL CIRCUIT
-(K22) TP SENSOR NO. 1 SIGNAL CIRCUIT SHORTED TO GROUND
-RESISTANCE IN THE (K900) SENSOR GROUND CIRCUIT
-MAP SENSOR
-THROTTLE POSITION SENSOR
-PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
25312083-mkm0xbqveb5zta3uncrswycs-5-0.png Auto Repair Help US 25312083-mkm0xbqveb5zta3uncrswycs-5-2.jpg

Dec 07, 2014 | Dodge Cars & Trucks

1 Answer

What does code PO108 mean on a 2001 Grand Cherokee


wow , you actually tried to look it up, a 1st time here.

the MAP is a baro sensor used to calculate fuel injection RATES.

if you have gross air leaks to the system the engine IDLE screams.

is it?

108 means the voltage is too high.

usually its unplugged, or bad sensor.

otential causes of a P0108 code: Bad MAP sensor Leak in vacuum supply line to MAP sensor Engine vacuum leak Short on signal wire to PCM Short on reference voltage wire from PCM Open in ground circuit to MAP Worn engine causing low vacuum



Bad MAP sensor Leak in vacuum supply line to MAP sensor Engine vacuum leak Short on signal wire to PCM Short on reference voltage wire from PCM Open in ground circuit to MAP Worn engine causing low vacuum



http://www.obd-codes.com/p0108



and last. but before ECU.

low engine compression, is 1 more, causes , many



what i do is reseat the MAP sensor

i then make sure he vacuum port is not clogged. (both sides)

i then measure the output , keyon, and idle and gunning throttle.

any Voltmeter works here,

key on is 5v or near.

idle 1.8v

gun engine as the RPMs fall like a rock the volts tries to hit 0.5vdc.



http://www.fixkick.com/look/odds-ends/jeep/MAP-sensor-output-real.jpg



very very easy to find with a voltmeter

if the meter agrees with vacuum gage, then the MAP is ok

and you have air leaks or low vacuum for (VAST reasons)

ask.

Aug 19, 2014 | 2001 Jeep Grand Cherokee

3 Answers

Starter turns over but will not start, the code that is coming up is P0107, MAP sensor. I cracked my injector line and i got fuel, so must be a Air problem


No, I would say that it is a FUEL problem. The Powertrain (or Engine) Control Module (PCM or ECM) uses the MAP sensor input to adjust the pulse-width of the fuel injectors and provide the correct amount of fuel to the combustion chambers. If the MAP sensor signal is too high or too low, the PCM will either shut the injectors off, starving the engine for fuel, or it will open them all the way up, causing the engine to flood.

Diagnostic Test Code (DTC) P0107 is TRYING to tell you that the computer has recognized a problem with the MAP sensor input circuits. THIS is what the problem is! Actually this code is saying that the input is LOW. This can be caused by broken wires, loose or corroded connector terminals, or a faulty MAP sensor.

I highly recommend checking the wiring before going out and buying a MAP sensor. It is that time of year...just this week I have fixed 4 cars that have had wire damage due to rodents getting up into the (WARM) engine compartment and chewing on the wire harnesses.

Nov 05, 2011 | 2002 Volkswagen Jetta TDI

1 Answer

Engine Code P0108. The engine revs up high and back low about 10 times before idling normally when first turned on. then there is other idling issues when accelerating to hard or at a stop. Are there...


P0108 - MAP Manifold Absolute Pressure/Barometric Pressure Circuit High Input

The MAP (Manifold Absolute Pressure) sensor measures engine manifold negative air pressure. It's usually a three wire sensor: a ground wire, a 5 volt reference wire from the PCM (Powertrain Control Module) to the MAP sensor, and a signal wire that informs the PCM of the MAP sensor voltage reading as it changes. The higher the engine vacuum, the lower the voltage reading. The voltage should range between about 1 volt (at idle) to about 5 volts (WOT wide open throttle).

If the PCM sees the voltage reading from the MAP sensor is greater than 5 Volts, or if the voltage reading is higher than what the PCM considers normal under certain circumstances, a P0108 DTC will set.


Symptoms of a P0108 DTC code may include:
* MIL (Malfunction Indicator Lamp) will likely be on
* Engine may run poorly
* Engine may not run at all
* Fuel mileage may decrease
* Presence of black smoke at exhaust


Causes: Potential causes of a P0108 code:
* Bad MAP sensor
* Leak in vacuum supply line to MAP sensor
* Engine vacuum leak
* Short on signal wire to PCM
* Short on reference voltage wire from PCM
* Open in ground circuit to MAP
* Worn engine causing low vacuum


Possible Solutions
A good way to diagnose if the MAP sensor is to blame would be to compare the KOEO (key on engine off) MAP sensor reading on a scan tool with the Barometric pressure reading. They should be the same because they both measure atmospheric pressure.

If the MAP reading is greater than 0.5 volt off of the BARO reading, then replacing the MAP sensor would likely fix the problem. Otherwise, start the engine and observe the MAP reading at idle. It should normally be about 1.5 volts (varies according to altitude).

a. If it is, the problem is likely intermittent. Check all the vacuum hoses for damage and replace as necessary. You can also try wiggle testing the harness and connector to reproduce the problem.
b. If the scan tool MAP reading is more than 4.5 volts, check the actual engine vacuum reading with the engine running. If it is less than 15 or 16 in. Hg, then the PCM is probably not seeing enough vacuum (due to a worn engine, perhaps) for a given operating condition (which causes a higher than normal voltage signal to the PCM) and setting the code. Repair the engine vacuum problem and retest.
c. But, if the actual engine vacuum reading is 16 in. Hg or more, then unplug the MAP sensor. The scan tool MAP reading should indicate that there is no voltage present. Check that the ground from the PCM is intact and also that the MAP sensor connector and terminals are tight. If the connection is good, then replace the map sensor.
d. However if, with KOEO, & the MAP sensor unplugged, the scan tool shows a voltage reading, then there may be a short in the harness to the MAP sensor. Turn the ignition off. At the PCM unplug connector and remove the MAP signal wire from the connector. Re-attach the PCM connector and see if with KOEO, the scan tool MAP reading shows voltage. If it still does, replace the PCM. If not, check for voltage on the signal wire you just removed from the PCM. If there is voltage on the signal wire, find the short in the harness and repair.


Hope helps (remember to rate this answer).

Apr 05, 2011 | 2003 Chrysler PT Cruiser

1 Answer

91 Chrysler New Yorker runs very rich. sometimes runs rough but usually seems to run ok but black smoke pours out the exhaust. If you accelerate hard it will leave a black streak on the pavement from the...


check that the map sensor vacuum hose is not leaking a leaking hose or a bad map sensor will cause the problem so will a bad cooant temp sensor. wireing to the above could be shorted or open.if a fuel injector were leaking or the controll wire to it were shorted to ground that also would cause it.if all the plugs were black when you changed them then look for an across the board problem like a sensor/vac hose/. if it had only one or two black plugs then look for grouned fuel injector wire or leaking injectors. one other possability could be a ruptured diaphram in the fuel pressure regulator. pull off vac hose and look for gas in the hose, start engine with hose off and see if gas comes out of the regulator if either have gas then replace regulator. oh forgot, that hose on the regulator has to have vacuum on it if it dont or hose leaks it will make fuel pressure to high and cause the problem. the exception to the vacuum at all times on the map censor and pressure regulator would be the 2.2/2.5l turbo. the vacuum to those censors is controlled with solonoids operated by the computer.
with engine off turn the key on/off/on/off/on and watch the check engine light it will start flashing the codes it will be like blink short pause then blink blink blink. that would be a code thirteen. if it has more than one code then after first it will blink out another always 2 digit codes if you miss count the blinks then turn off key for a minute and repeat. let me know what the codes are

Jun 09, 2010 | 1991 Chrysler New Yorker

1 Answer

1991 302 runs like it is chocking out, I have changed the fuel filter, plugs wires rotor cap, and map censor, runs rough and worse when in gear, eating gas..help please? The truck is a 1991 f150 NITE 4x4


is it idling high and you put it i gear it runs rougher and smoke black check your coolant sensor also connection or sensor itself and fuel pressure if high check for return line blockage also vacuum leaks make sure you have the right vacuum going to your map sensor you need to check right vaccum at idle going to your map sensor/

Jan 19, 2010 | 1991 Ford F150

1 Answer

Diagnostic Code P2074 on 2007 PT cruiser-can't find on OBD list.


P2074-manifold Pressure/throttle Position Correlation

CORRELATION - HIGH FLOW/VACUUM LEAK

When Monitored: Engine Running, during all drive modes.
Set Condition: If vacuum drops below 1.5 Hg with engine RPM greater than 2000 RPM
at closed throttle.

POSSIBLE CAUSES

VACUUM LEAK
HIGH RESISTANCE IN MAP (K7) 5 VOLT SUPPLY CIRCUIT
RESISTANCE TO GROUND IN MAP (K7) 5 VOLT SUPPLY CIRCUIT
MAP SENSOR
HIGH RESISTANCE IN (K1) MAP SIGNAL CIRCUIT
RESISTANCE TO GROUND IN (K1) MAP SIGNAL CIRCUIT
HIGH RESISTANCE IN (K4) MAP GROUND CIRCUIT
PCM
TP SENSOR OPERATION
HIGH RESISTANCE IN (K6) TP SENSOR 5 VOLT SUPPLY CIRCUIT
RESISTANCE TO GROUND IN (K6) TP SENSOR 5 VOLT SUPPLY CIRCUIT
TP SENSOR
HIGH RESISTANCE IN (K22) TP SIGNAL CIRCUIT
RESISTANCE TO GROUND IN (K22) TP SENSOR SIGNAL CIRCUIT
HIGH RESISTANCE IN TP (K4) SENSOR GROUND CIRCUIT

Mar 27, 2009 | 2007 Chrysler PT Cruiser Touring Hatchback

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