Question about 2004 Saturn ION

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MAP sensor There are three wires coming out of the map sensor on my 2004 ion (2.2L). Which one goes to the computer, which is the ground and which is + ? Thanks.

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  • travelj_g Jun 26, 2008

    The colors of the wires are orange, green, and white. Any suggestions?

  • IQUIT May 11, 2010

    what colors are the wires?

    Black is usually a ground

    Red is usually power



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Posted on Jun 29, 2008

  • IQUIT Jul 03, 2008

    Try using a multimeter see if you can ID the hot and ground that way, otherwise contact a Saturn dealer, see if you can get the info from the service department. Mine was very helpful when I was fixing my throttle butterfly and EGR Valve.



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1 Answer

Mapping codes P0107, P2263 & P2227 come up on scan tool what are these codes relating too? Ford Ranger 2008 not 2004 3.0 4 door

code p 0107 refers to manifold absolute pressure (MAP) sensor /barometric pressure (BARO) sensor --low input ====causes --wiring short to ground ---MAP sensor ---BARO sensor ---ECM
code p 2263 refers to turbo charger (TC) boost pressure /supercharger (SC) boost pressure ---performance problem====causes --mechanical fault
code p 2227 refers to BARO sensor -range / performance problem===causes wiring --- BARO sensor --- ECM
I would be testing the BARO sensor for a problem as it is listed for all 3 codes
if you don't have such a sensor you have a MAP sensor which is reading in the same area so test that as well

Oct 19, 2015 | 2004 Ford Ranger

1 Answer

What is code p0106

A P0106 could be caused by: Bad MAP sensor Water/dirt intrusion affecting MAP sensor connector Intermittent open in the reference, ground, or signal wire for the MAP sensor Intermittent short in the reference, ground, or signal wire for the MAP sensor Ground problem due to corrosion causing intermittent signal problem A break in the flexible air intake duct between the MAF and the intake manifold Bad PCM (do not assume the PCM is bad until you've exhausted all other possibilities)

Feb 19, 2015 | 2004 GMC Envoy

1 Answer

1995 z24 2.3 cavalier won't idle when MAP sensor is plugged in

I usually want to check sensor wiring circuits before replacing anything. As you can see, the map sensor shares ref voltage and ground with others. Orange wire with black tracer is signal return. The gray wire should be ref voltage 5 volts. The signal wire should be lite green. Vacuum for the map sensor is also important. What was actual trouble code was it two digit code or five?

Oct 20, 2017 | 1996 Chevrolet Cavalier

1 Answer

My 2004 forenza start good but when i step on gas it dont have power even shut off the intake manifold is dirty in the inside and the scanner give me code p0108 . PLEASE HELP!!!

P0108 Manifold Absolute Pressure/Barometric Pressure Circuit High Input

What does that mean? 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 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.

Dec 22, 2010 | 2004 Suzuki Forenza

2 Answers

On a 97 jeep grand cherokee, which wire coming

Should be pin 27 in the black connector on computer.

Jun 22, 2010 | 1997 Jeep Grand Cherokee

1 Answer

On a 2004 trailblazer,where is the map sensor located? i checked it at local auto zone store,they said it was map sensor.

map sensors or manifold air pressure sensors are mounted either on the intake manifold or the throttle body. in some cases they are monted on the firewall with a vacume line running to them from the manifold. they have a three wire connector plugged into them.

Feb 16, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

Codes reading 31 what is this, 95 geo lsi with 1.8 engine

A MAP sensor problem will cause the symptoms you are experiencing. The MAP sensor is critical because you have a speed density type fuel injection system. Without the MAP sensor signal or an inaccurate one, the ECM won't know the engine load for ignition timing and fuel injection adjustments. The engine computer is detecting a high voltage condition on the MAP sensor signal circuit.
Inspect the vacuum hose going to the MAP sensor. Replace it if is looks cracked or if it collapses on itself. Make sure that the MAP sensor has vacuum by disconnecting the hose from the sensor when the engine is running and feeling for vacuum.

If you have vacuum, you can check the MAP sensor and its circuits with a multimeter. There are three wires going to the sensor. I am not sure on the colors, but Yellow should have 5 V on it with the key on. Brown is ground and should read close to 0 ohms. Light Green with a Red stripe should have 5V on it with the key on. If you backprobe the MAP sensor connector with it plugged into the MAP sensor on the light green/red wire and apply vacuum to the sensor, the voltage should drop.

Jul 20, 2009 | 1995 Geo Prizm

1 Answer

MAP or MAF Sensor Diagram for 2005 Town&Country Touring Van 3.8l.

Yes it has a sensor and they are color coded however I don't think it's called a maf or map sensor that’s a GM name, there would be three wires on it on ground one 5 volts reference and one for connection to the computer to tell the computer how much air flow there is, and the reading would be from 1.5 volts to 4 volts.

Jun 20, 2009 | 2005 Chrysler Town & Country

1 Answer

Map Sensor Wires Question


On a 3-wire MAP sensor connector when looking at the vehicle "wiring harness mating side of the connector" (and not the sensor connector) - with the snap detent pointing UP and looking LEFT to RIGHT the signals will read >


Hopefully we are talking about a MAP sensor, and NOT a MAF sensor as the 2 are different as to the wiring signals.

Color of the wires doesn't matter, as you are just looking for backprobed voltage SIGNALS only using an adapter if you are doing in-circuit signal testing.

POWER I believe should be in the 5-volt range unless Jeep is using 3.3-volt.

Usually the MAP SIGNAL voltage range is quite a bit lower on the sense line, but with Jeep you never know? If using a good DVM measuring the MAP SIGNAL voltage you should see a smooth decrease in voltage as the vacuum is increased. If there is no voltage change or negative swing then the sensor may either be bad or else you have an OPEN or SHORTED wire between one of the 3 connector leads and the PCM computer, which would be rare.

I take you are troubleshooting a specific CHECK ENGINE CODE hopefully, as if not I would have the PCM read properly with a good CAN OBD II code reader to pinpoint the troublesome sensor.

I've always used an ACTRON CP9087 Sensor Tester, and a CEN-TECH 94169 CAN OBD II code reader which works great for me.

Make sure your MAP vacuum line is good and hooked up right as well.

Let me know what you find?



Jul 10, 2008 | 2003 Jeep Grand Cherokee

1 Answer

Map sensor wiring for Chevy s-10

Well after looking it up it's the the map input wire is light green on both 4 and 6 cylinder models.

On a 4cyl the map has black gray and light green, the black is ground, the gray is a 5 volt refrence from the pcm(power control module), and the light green goes to to ECU for MAP input.

On a 6cyl the map has black gray and light green, the black is goes to the automatic transmission, gray is a 5 volt refrence from the pcm(power control module), and the light green goes to to ECU for MAP input.

Hope this helps and good luck

Jul 01, 2008 | 2000 Chevrolet S-10

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