C270 goes in limp mode M Benz tech department said maf sensor and throttle control, I replaced both and the same happened

Question edited for clarity, changed the 'mad sensor' to MAF, added maker.

A couple of 'curve ball fixes. Who would have thought?

06 Mustang limp mode

460 Ford Forum https://www.460ford.com > ... > Chilly's Garage
Dec 22, 2007 - As far as the 06 mustang goes. A guy at work had the same problem of it going into limp mode. What was causing it was a bad temp sensor. It was ...

Limp Mode

Mustang Evolution Forum https://www.mustangevolution.com > threads > limp-...
Unplug fuse 47 under the hood fuse box. Leave it unplugged for about 10 mins. This will reset the driving habits it has learned and your car will relearn how to ... Same issue here

I have a 2006 mustang gt and the mass air flow sensor isn't

JustAnswer https://www.justanswer.com > Ford Repair
Jun 11, 2021 - The car is throwing a p0102 code and goes into limp mode. The MAF is not getting the correct voltage! Ford Mechanic: StevenA35. Verified ...
1 answer · Top answer: Hello! My name is ***** ***** I'm an ASE certified Master Automobile Technician. Please ignore ...
I have a 2005 Ford Mustang. Throwing codes:P0420, P0102
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What causes hesitation I am getting in my MAF but I am still ...
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I have error codes P0161, P0102, P0443, P1451, P0135, P0136
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Did you buy a quality OEM MAF sensor, or one from China or Mexico? Quality matters with sensors, many are DOA of fail fast.
Did you clear the codes with a scan tool?

If you are in Limp Mode, the scan tool will tell you why?

If the battery light is flashing on and off, you have a battery issue, a wiring issue or you have an alternator charging issue.

All your faults can be diagnosed cheaply by an auto electrician using a Professional Grade Scan Tool COMPUTER. This is not a normal $125 scan tool. They cost between $3.5k and $5,000. Employing an electrician in far cheaper than guessing parts to swap out, test always, then replace.

https://www.google.com/search?q=auto+electrician+near+me

..

Why would you just buy a used computer instead of reading the codes with a scan tool and fixing the issues that put it into Limp Mode. It is often something as simple as replacing a $18 sensor. Your ECU needs programming with VIN Number and the mileage so you need an auto-electrician anyway.

Rough idle is probably a throttle body and MAF that needs cleaning or they may have failed. It may also be the Throttle Position Sensor. Limp Mode keeps you in first and 3,000 rpm. Limp Mode only saves you from damaging the engine. Get it on a pro grade scan tool computer in a repair shop.

all in the link

https://www.google.com/search?q=2006+ford+five+hundred+limp+mode

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Yeah , take it to a qualified repair shop.

Yes most likely a vehicle goes into limp mode up failure of MAFS unplug the sensor and see if you have any better performance getting it to the shop

redux1
after many posts, we see only 1 clue engine
MAF
the 6ve1 engine
that told me what engines. one word, mAF.
if just one MAF (no map)
so all air leaks are slow rpm caused by lean
but if pcm goes in to limp home mode.
it car race, due to loss of IAC controls
the engine does not run like you think
the CMP/Cke sensors,
if they die , the engine dies.
if they misfire, the engine misfires and slows and stalls'

are you using good scan tools real that see all factory codes. p1, p2xxx?
not just fedcodes, p0xxx?

the 3.5v v6 has a MAP and a MAF BOTH.
on some engines like this, the Map is for idle
and the mAF of for fast.
fooling many machanics
dual mode systems,
the MAF sensor is not very accurate at idle
is the reason for the dual mod
so vacuum leaks, I SAY.

code p 0171 refers to system too lean bank 1== causes --intake /exhaust leak---AIR system---MAF/VAF sensor ---fuel pressure/pump--- injectors--- Heated oxygen sensor
by changing the O sensor (oxygen sensor ) you changed the wrong one and so there would be no change to the read out there
code p 2173 refers to throttle actuator control (TAC) system -high air flow detected ===causes --intake system---throttle body
fix the causes and you stand a chance of fixing the problem

check the mass air sensor. the left maf sensor is for the right bank , right maf for left bank of cylinders on that engine.

• Your MAF sensor is malfunctioning. You can try to unplug it and clean the contacts and plug it back in and see if that works. If not simply replace the MAF sensor. This is what causes limp mode in Nissan's.
• You will probably have a P1102 code which will tell you "Traction Control Solenoid" which amounts to your MAF sensor is in range but lower than expected. Your vehicle is probably bogging out at RPM's that it normally functions fine at.
• After you clean the contacts make sure to have Auto Zone reset the code for you. If your car goes into limp mode again just throw in a new MAF sensor and again have the computer reset at Auto zone (free).

• Hope this helps and thank you for using FixYa.

Regards, Tony

Limp Mode - These cars are designed to protect themselves from engine damage. If the engine boosts too much, or the engine does not get enough fuel it will go into a limp mode where boost is limited to protect the engine. It limits boost by controlling a solenoid on the wastegate line (N75), by closing the electronic throttle or by opening the DV valve. If you are experiencing a limp mode the best thing to do is get the car scanned for codes and to see what is wrong. Look at fuel trims for signs of running lean, and to look for MAF problems, or O2 sensor problems. To look for potential boost problems log Block 115 and you can see the specified Vs actual boost. If you exceed the specified then there is a good chance that you will go into this limp mode. Stock specified is a max of 14 psi for a 2002+ car.MAF - Mass Air Flow Meter - is used to measure the air going into the engine. It is located on the outlet of the airbox, and housed in a cylindrical tube. The ECU reads the MAF signal, and injects fuel in proportion to the airflow. There are a few different ways the MAF can fail. The MAF can get coated with oil, and will not read properly. This is common if it happens right after installing a CAI, or a K&N filter. It can be cleaned out with 99% isopropyl alcohol, or a quality electronics cleaner. Remove the sensor from the housing and clean the sensor element.
MAF sensors also go bad due to too much airflow. On a car with a larger turbo the airflow is so high that the MAF element will get burned out from the excess air flow. It is common to increase the size of the housing to prevent this (other modifications required).
To check for a BAD MAF the best way is with a VAG com. Block 002 show air mass from the sensor. At idle the air flow should be 2-4 grams/second. With a wide open throttle run to redline the reading should show up to 170 g/s on a chipped car. Look for jumpy readings in the MAF, which can indicate a problem. More details here: http://www.ross-tech.com/vag-com/cars/fuel-trim.html

if you suspect your MAF is bad, one way to test it is to unplug the MAF, often if the MAF is giving false readings and upsets the fueling. If you unplug it, the ECU will ignore the MAF and run off of baseline tables. Be careful, as a boost leak or a vacuum leak can be miss-diagnosed as a bad MAF, because they will throw off the readings on the MAF. (Air sneaks around the MAF).

actually it works in battery. check the coil associated with the RPM meter or if your battery charge is low recharge it. You ll get it fixed :) Please rate this!!