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Can i clean or check the map sensor 99 sunfire

I get an error on scan tool that says limited activity at map sensor. can i check this sensor or clean it some how

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  • Cars & Trucks Master
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Yes you can with sensor safe cleaner. They sell it at auto parts stores. If it doesn't work after cleaning it do not buy the sensor at a parts store. Spend the extra money and get the correct sensor at the dealership. If you dont you may buy and replace it again when the $28.00 part from the parts store doesn't fix it. Spend $22.00 more the first time and fix it once .

Posted on Aug 10, 2017

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I know this post is old, but right on the engine theres a sticker that says use multi-ground plugs only. I read a similar problem like yours and it seemed to turn out that the spark was arcing to ground over the ceramic on the plug. So maybe it could have something to do with the single ground plugs.

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spray them off with brake cleaner.

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SOURCE: 99 RX300 Engine code keeps coming up lean

I just had the same thing happen to my 99 RX300. I replaced the MAF sensor and cleaned the throttle body. We cleared the codes and check engine light came on again... with a knock sensor code. Had to replace knock sensors. Found some great info on how to do that here. http://us.lexusownersclub.com/forums/index.php?showtopic=41266&mode=threaded Car drives great now!

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SOURCE: Hello, my 99 JGC Limited (V8, 4.7) rough idles and

u need to check ur voltage at the wire and also for a ground. and if there are any vacuum hoses loose or out of place. are there any other codes in there

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  • 14036 Answers

SOURCE: pontiac sunfire 99 where is the map sensor locete

MAP SENSOR LOCATED BACK TOP INTAKE ON THROTTLE BODY NEXT TO IDLE AIR CONTROL VALVE.THE MAP SENSOR WILL HAVE A SMALL VACUUM LINE CONNECTED TO IT.

Posted on Jun 25, 2010

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How do I fix a serial 2 data link malfunction on a 4 cylinder 99 sunfire


Hey John ! how's it going ? How do you know you have a class 2 data bus problem ? Need some more info ! Do you have a scan tool ? Can't communicate with the PCM ? Have a check engine light on ?
You may access 2 data lines with the scan tool. The serial data line UART (circuit 800) allows the following components to communicate via serial data:
?€¢
The scan tool


?€¢
The powertrain control module (PCM)


?€¢
The instrument panel cluster


?€¢
The sensing diagnostic module (SDM)


?€¢
The electronic brake control module (EBCM)

The serial data line class 2 (circuit 1807) allows the scan tool to access directly the PCM in order to read emissions-related information. The scan tool gains access to both data lines through the data link connector (DLC). You may then monitor or control system operations for diagnostic purposes.

Mar 08, 2015 | 1999 Pontiac Sunfire

1 Answer

2006 suzuki reno code 2106


read the FSM book yet or alldata.com???????
2106
2L automatic?

says
Trouble Code: P2106 (2.0L L4 VIN - Auto)
Throttle Actuator Control (TAC) System Performance - Throttle Limitation Active
Number of Trips to Set Code: 1
Trouble Code Conditions:
Ignition ON. The ECM detects the system is in Limit Performance Mode.
Possible Causes:
  • Throttle body
this means the ECU is in limphome mode.
and is cause because the ECU sees throttle sensors. that dont JIBE
There are effectively (insane yes) 4 TPS sensors
2 under foot.
2 in TB.
if any disagree at any time BAM, limphome mode sets.
"limited performance, old suz name was FAIL SAFE.
no matter its just the same.
use a REAL scan tool that sees ALL codes, i suspect you missed some, is this an AUTOZONED scan? with cheap, tool?

try an Innova 3160 tool. and see them all.

it is suspisious to me , only ONE DTC error !!!

Jul 12, 2014 | 2003 Suzuki Aerio

1 Answer

Smog code p0108


this is for the MAP sensor , it can also be a wiring fault and not the actual sensor so i've copied and pasted to save time a guide
Symptoms Possible sumptoms of OBD code P0108
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 Possible causes of OBD code P0108
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 this helps

Jul 08, 2014 | 2001 Pontiac Sunfire

1 Answer

Map sensor failure symptoms


The CEL is only for smog , here USA, nothing else really.
the only way to see ALL errors, is to use a SCAN tool.
the scan tool shows ALL, all DTC errors, and live data.
I bet the MAP is good. (did you clean it ?)
the car has many engines opted, , not one can i guess.
so no engine, no joy.

was told means nothing, only fact matter.
get it fixed or learn to use a scan tool and read the FSM
book , see how to do the tests to find TRUE cause of symptoms , not one stated. here.

"the FSM is 4 bucks to read" factory service manual, ask.

Jun 20, 2014 | 2005 Suzuki Forenza

1 Answer

Where is the IAT sensor on a 1999 jeep grand cherokee limited 4.7L


great question, on some cars, its NOT THERE.
nice how you actually state engine option.
but way not post symtoms, or evidence. (got DTC errors from scan tool?)
fsm says.
4.7 quote:
The Intake Manifold Air Temperature IAT sensor is located on the left side of the intake manifold.
For a temperature of 68F (20C) the resistance is approximately 6000 ohms. For a temperature of 104F (40C) the resistance is approximately 3300 ohms. (this forum hates degrees symbols , dang)

its just a Thermistor. NTC

on some cars, its in the MAF
others its screwed in to the air cleaner box.
others, (yours) its in the air plenum. (MAP base EFI)
the map system needs the plenum baro and temp. TOGETHER.

Nov 25, 2013 | 1999 Jeep Grand Cherokee Limited

1 Answer

I have a 2008 Suzuki Forenza with 62,000 miles. I am having a hesitating problem. It occurs when proceeding from a stop, but not through the remaining gear changes. It next occurs and you can feel it...


300 is misfire random and might be caused by that limphome mode. The ETC errors always set that mode. RTM read the FSM.
"forced limited power" =failsafe =limphome.
this car has fly by wire. so..... is complex due to that fact.
first do a tuneup. then clean the EGR. (if it leaks , you will get lots of errors and misfiring. at idle. (the freeze frame ,using scan tool shows the parameters that the DTCs failed (last one)
then clean the ETC parts, (idle valves, )
ETC (not ECT) is the engine ,electronic throttle control
the MAP sensor has TSB recall, or service warning for icing up.
no, they didn't fail all at the same time, the ecu only knows
that the tests failed.
here is a crazy example. your intake sucked in Seagull.
and cause may things to read crazy wrong. and you get many DTC.. see? and it's only a seagull,

The way to trouble shoot EFI is to think like an ECU.
case in point:
you step on gas pedal. it's a POT (resistor) the ECU sees you demand acceleration. Pot voltage rises... and...
the ecu then tries to open the throttle.( and electric motor, for fly-by-wire)

1: say it cant? the motor valve in the ETC is sticking.? TV sticks.
it can NOT tell way it is bogging , only that its is not reacting correctly.
so it sets DTCs.. for the ETC. many.

The ECU can not figure out why, it bogs, so guesses.
Is the 60k mile new air filter , still clean? or full of mice nests.?
2: or the EGR leaks. and bogs, off idle stops. same, deal.
the ecu can not tell what caused the bog. but takes wild guesses
the ECU is brick stupid, and only reports failed tests.
3. or the TSB on the MAP , it ices up, fails and bogs, and ECU
sends a barrage of DTCs,

The process of elimination is not a guess. $$$$$$$

it's the technician doing tests. and the 60k mile service top this list.
a full tuneup, clean the egr, and ETC valves. ,spark plugs. filters.
the EGR has a feed back POT. (var. resistor)
ive seen cars that learn the EGR wrong, it sticks open
then learns open, as good. (bad) (EGR software varies wildly by makers and year)
so, i never discount EGR failures, as a source of trouble.'
tests:
reset ECU: scan tool , push reset. all DTCs cleared.

What id do is look at all Scan PID's, to see if there are funny reading sensors,
see if you can get DTCs just in Neutral, at idle or gunning the throttle.
Does the ECU hold closed loop, ? at idle
if if race motor say 2500rpm steady does it hold closed loop?
is the TPS responding 1 for 1 with my right foot? scanned.
look at each sensor with the scan tool, for bad readings.
keep in mind , some sensors can be way off and the ECU will never report it, only human eyes on the scan tool screen
can judge right or wrong.
Is LTFT (long term fuel trim) near 0? or at -40 or +40% ???
an iced up MAP will wreck trim, fast.

i guess you never priced the parts?
$$$$$$ for guessing?

a scan tool is $9 , a code reader is near worth less. \
readers...
you get a list of numbers, all near useless..... but 300s are the key !
use a real scan tool . SEE with binders off.
find out what DTC throws first. ? and using the freeze frame
see what the conditions were, at the fail. in FF.

the throttle valve is just air supply and is not a AFR, determining device. it only lets in more air.
THEN
THe MAP reads the pressure and the ECU uses the MAP to set FUEL rates (speed density system it is)
so The ETC is not a device to cause misfire. (wrong idle yes) or bogging, (ETC motor stalled)
My best guess, (useless) is that the map did ice up, ?
1: map ice
2: egr leaking
3: TV sticking, throttle valve and motor ETC.

best is to find a real ASE mechanic, they don't guess.
Is not drive by wire fun?????
once engines reach this level of complexity, the solutions take harder work. How the ECU reacts to all types of failures vary by maker, and year. (soft/firmware).

Oct 26, 2013 | 2008 Suzuki Forenza

1 Answer

Took my 99 Sunfire to Pep Boys because the starter was busted. After changing the starter, for which they had to disconnect the battery. The car would not start. They said the battery was bad so they...


first , find an accredited shop that knows what they are talking about as you are being led by your wallet
the first check in any good shop is a load test on the battery, clean and tighten the battery terminals , the pull and bench test the starter , then repair / replace as necessary
removing the battery activates the immobilizer so it is necessary to reset using a scan tool
From your statement , none of those things were done so the shop has little knowledge of repairs
the system can be bypassed but I consider it not necessary if proper procedures are followed

Apr 26, 2017 | 1999 Pontiac Sunfire

2 Answers

Chech engine fault PO108 Circurt High Voltage Whats the repair


The Engine Control Module (ECM) has detected a performance fault with the Manifold Absolute Pressure (MAP) sensor

The Manifold Absolute Pressure (MAP) sensor provides instantaneous manifold pressure information to the engine's Engine Control Module (ECM). The data is used to calculate air density and determine the engine's air mass flow rate, which in turn determines the required fuel metering for optimum combustion. A fuel-injected engine may alternately use a Mass Air Flow (MAF) sensor to detect the intake airflow. A typical configuration employs one or the other, but seldom both. .

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


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 this helps; keep us updated and remember to rate this answer.

Apr 15, 2011 | 1997 Pontiac Sunfire

1 Answer

Pontiac sunfire 99 where is the map sensor locete if Im standing from of car?


MAP SENSOR LOCATED BACK TOP INTAKE ON THROTTLE BODY NEXT TO IDLE AIR CONTROL VALVE.THE MAP SENSOR WILL HAVE A SMALL VACUUM LINE CONNECTED TO IT.

Jun 25, 2010 | 1991 Dodge Ram 150

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