Question about 1988 Ford F 150

1 Answer

Check engine light on,

I changed the air flow sensor, the coolant sensor, the power stering sensor, and the light is on.

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  • Mike Butler
    Mike Butler May 11, 2010

    I guess you've now learned that sometimes it's better to have it scanned for problems, then hit & miss. Sorry, but you aren't the first & won't be the last. Some of the symptoms for these sensors are so similar, that it's hit and miss. What was your original complaint/problem, that you were having? Sometimes we can pinpoint it right of the bat, other times, a scan is obsolutely necessary, in order to save you money & aggravation.

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  • 398 Answers

For a ford this old put a piece of electrical tape over it in the dash!

Posted on Feb 25, 2009

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My 2000 Silverado is running bad it started loosing power backfiring so I replaced roster button cap plugs wires didn't back fire but still run bad so I replaced gas filter still run bad


Have it tested with a scan tool ,check engine sensor data parameters ! Possible dirty or bad mass air flow sensor ,O2sensor ,Coolant temp sensor, map sensor etc... Check for vacuum leaks , Plugged fuel injectors , dirty throttle plate , also check fuel pressure . Is your check engine light lit ?

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Dying, not starting after it's been warmed up. Runs beautiful on cold engine. Replaced plugs, wire, cap, rotor and crank position sensor, no luck.


Your car cold start valve puts more gas into the system keeping your engine running higher RPM. When you car warms up, the cold start valve will stop working and your car RPM will drop. What you could have is a vacuum hose disconnected which puts more air into your engine - therefore when you press on the gas pedal, your engine would shut off or you find lack of power and then shut off.

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2003 Nissan Altima 2.5L Service Engine Soon Light is on, Auto Zone says codes are for MAF and O2 Sensors. Car hard to start after driving a while but when starts appears to run smooth. Auto Zone thi


ok lets start with the codes they say your getting. P??? which 1's and how many. there are few o2 sensors, are they next to the Exhaust next to the converter? MASS AIR FLOW -MAF use this, for now i am guessing, until i see the correct codes your are getting. this could be the 1 you may have below, please read it........
  • P0103
    Mass Air Flow Sensor Circuit High Input
  • Possible causes
  • Faulty mass air flow sensor
    - Intake air leaks
    - Dirty mass air flow sensor
    - Dirty mass air filter
    - Mass air flow sensor harness is open or shorted
    - Mass air flow sensor circuit poor electrical connection
  • Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.
  • possible symptoms Engine Light ON (or Service Engine Soon Warning Light)
    - Engine stall
    - Engine running rough
    - Excessive fuel consumption
    - Excessive smoke
  • the code is generated when An excessively high voltage from the sensor is sent to Engine Control Module (ECM).
2003 NISSAN Altima Sedan OBDII Codes List

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1 Answer

2003 Hummer H2 - Check Engine Light- P0171 and also been leaking/losing coolant a lot lately! Could the two issues be related or separate problems?


Fuel system too lean (too much air, not enough fuel) vacuum leaks being the most common, you might want to check for a bad airflow sensor, plugged fuel filter, clogged fuel injectors, low fuel pressure, exhaust leaks, a bad PCV valve, bad oxygen sensor, stuck open purge valve. mass air flow (MAF) sensor are fairly common too. Sometimes the mass air flow sensor just gets dirty and gives false air flow readings.

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P0068 on a 2006 Dodge Ram 1500 SLT. Rough "hunting" for idle. Momentary lag/loss of power from a stop. Random RPM changes while at a constant speed. Sometimes it feels like it drops out of gear...


P0068 Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of power
- Engine rough idle Possible causes - Large vacuum leak
- Leaking air duct system
- Mass Air Flow (MAF) poor electrcial connection
- Manifold Absolute Pressure (MAP) poor electrcial connection
- Faulty Mass Air Flow (MAF) sensor
- Faulty Manifold Absolute Pressure (MAP) sensor
- TP sensor not seated properly.
- Faulty Throttle Position (TP) sensor.
- Dirty throttle body
When is the code detected? The Powertrain Control Module (PCM) monitors operation rationality check by comparing sensed throttle position to mass air flow readings
P0068 DODGE Description The Powertrain Control Module (PCM) monitors a vehicle operation rationality check by comparing Throttle Position (TP) to Mass Air Flow (MAF) readings. If, during a self-test, the comparison of the TP sensor and MAF sensor readings are not consistent with the calibrated load values, the test fails and a diagnostic trouble code is stored in continuous memory.

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PO103 and 116 code on a 1997 jetta 2.0


P0103 - Mass or volume air flow circuit high input.

Symptoms: Engine stalls, running rough, excessive fuel consumption, excessive smoke from the tail pipe, check engine light on.

Possible Causes: Dirty mass air flow sensor, dirty mass air filter, mass air flow sensor harness is open or shorted, mass air flow sensor electrical circuit poor connection, intake air leaks, faulty mass air flow sensor.

P0116 - Engine coolant temperature circuit range/performance.

Symptoms: Check engine light on.

Possible Causes: Low engine coolant level, ECT sensor harness open or shorted, ECT electrical circuit poor connection, faulty engine coolant temperature sensor (ECT), faulty engine coolant thermostat.

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1 Answer

Check engine light code P0172. I have been having the computer reset with oil change place so the check engine light goes off and usually stays off for a long time. Finally, the light came on and then...


The code you mention, P0172 - Fuel Trim Malfunction - System Too Rich (Bank 1)
The engine is a 2.0 lit (4 cylinder). Have you checked to see if the vehicle's powertrain is still under warranty (to include fuel system problems)? If original owner & under 100,000 miles, it may very well be under the powertrain warranty. Check with your nearest Hyundai Dealership & ask the appropriate questions.

My experience with this particular Fuel Trim Malfunction:

1. Clogged engine air filter restricting proper intake air flow
2. Leaky fuel injectors
3. Fuel pressure too high
4. Faulty MAF (Mass Air Flow Meter/Sensor).
5. Faulty TPS (Throttle Position Sensor).
6. Faulty Intake Air Temperature Sensor (IAT)
7. Faulty Engine Coolant Temperature Sensor (ECT).

These causes are only offered as a place to start looking/diagnosing -- NOT intended to cause you to start throwing money after engine parts which may not be the cause -- have it properly diagnosed (probably under warranty).

Hope this helps.

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1 Answer

I have black smoke coming out of my Volvo 940...i have changed the air mass flow..the air filter....the coolant temp sensor and the control box...it idled well for about 15mins then it went back to the...


could be but not prob not any check engine lights black smoke indicates it is running rich (more fuel than air) i would lean towards oxygen sensor . engine codes would be the place to start

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2 Answers

When driving my lincoln 1998 after about 10 miles or so, you can feel it hesitating about to stall.. there was a service engine light pointing to O2 sensor 1 bank II. could this be the cause? since the...


Hello. I can assist you. Generally when a scan is done, the technician will clear out all of the codes and hope that the problem self corrects. I am glad you passed the state emissions test. Now let's get to the bottom of the hesitation. Generally all lincoln and ford cars that hesitate like yours have a problem with the "mass airflow sensor". Most likely you will need to replace it.
The Air Flow Sensor or Mass Airflow Sensor (MAF) is one of the components of an electronic fuel injection system and is found in many of modern vehicles. The Mass Air Flow sensor is usually installed inside the intake air duct between the air filter and the engine. The Mass Air Flow sensor is used to measure the amount of air entering the engine. This measurement is used by the engine computer or ECM to calculate proper amount of fuel injected into the cylinders in order to provide optimum combustion and low emissions.
Problems with Mass Air Flow sensors are common. Bad or contaminated Mass Air Flow sensor can possibly cause a wide range of various vehicle driveability problems such as stalling, especially when the engine is cold, misfiring, poor acceleration, etc.
In addition, a problem with the Mass Air Flow sensor often causes the "check engine" or "service engine soon" light in the vehicle instrument panel to illuminate.
The "check engine" or "service engine soon" light comes on when the engine computer detects some fault in one of the components of the emission control system.

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3 Answers

I have a 1995 ford taurus engine stalls when idling and smells of gas when accelerating it bucks. Changed fuel filter, could it be mass air flow sensor?


Start with smaller problems and check the fuel pressure regulator, the mass air flow sensor for these vehicles is pretty pricy. Is the check engine light on? If so, head to your nearest auto zone and have them check for trouble codes. If the check engine light isn't on, its not likely your mass air flow sensor

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