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Has codes p0240,p0100,p0089 replaced all sensors still getting codes

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With the engine off and the battery negative cable disconnected, check all electrical connections at the o2 sensors, MAF and elsewhere. Under-hood temperatures tend to cause some oxidation on the terminals themselves. I've seen this issue with nearly every Volvo I've owned. Use electronics cleaner and dielectric grease on the connectors, especially on the MAF connector.

P0240 (Catalyst working below efficiency threshold) means the downstream (2nd) o2 sensor is not moving. The reason for this sensor's existence is pretty simple - detect catalyst efficiency and possibly failure in the field. The upstream sensor must be in good condition and not 'lazy', meaning it is slow to respond to the oxygen levels coming out of the exhaust. It must be quick to respond. The downstream o2 sensor, however, usually doesn't change state as much, meaning the catalyst is doing its job. The idea is that if that downstream sensor starts to mimic the upstream o2 sensor activity, catalytic function can be inferred to be less than normal. Ensure the connections are good on both sensors. Replacing only the upstream o2 sensor will not cure this. Catalytic convertor failure is rare in the field but if you have been running rich, it's possible a large quantity of unburned fuels have destroyed or eroded the substrate. The only way to tell is put a scan tool on the car and monitor both sensors, capturing any freeze frame data along the way. Upstream sensor should be rapidly changing state and downstream should be changing state much more slowly.

P0100 (MAF circuit - malfunction) usually points towards wiring issues or problems with the connector, especially if the MAF is known good.
P0089 (Fuel pressure - regulator) could be a worn fuel pump, clogged filter or the regulator itself. Have the fuel system pressure tested, verifying components along the way.

If all checks pass at this point, it is possible that the connections at the ECM itself need cleaning (do not unplug the ECM with the battery negative cable connected). If you perform this procedure do so with extreme caution and scrupulous cleanliness. Allow the cleaner to completely evaporate off the terminals or there could be a serious short condition that will destroy that 600 dollar computer.

Posted on Oct 22, 2013

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Posted on Jan 02, 2017

ftw1952
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SOURCE: Error Code P0240 on 2001 Ford Windstar

The catilytic convertor is at fault and needs replacing.
Have it checked first for a 02 sensor can throw this code as well. If the convertor is turning red on the outside it is junk status. Also the engine will sound like its starving for fuel

Posted on May 17, 2010

blueextc3221
  • 15935 Answers

SOURCE: 2003 Sprinter 3500 2.7. Mass air code still after

P0100 OBD-II Trouble Code

Technical Description

Mass Air Flow (MAF) Circuit Malfunction

Basically this means that there's a problem with the Mass Air Flow (MAF) sensor or circuit.

You will likely not notice any serious driving problems, but there may be symptoms like a general decrease in power or sluggishness.
Causes

A code P0100 may mean one or more of the following:

* The MAF may be disconnected, or a wiring connection may be bad.
* The MAF sensor may be faulty.

Possible Solutions

Use an OBD II Reader (or go tou your local parts store and they will for free) and reset the code and see if it comes back.
Then start with the cheapest, easiest repair procedures:

* Check the Mass Air Flow Sensor wiring/harness is connected properly and that there are no broken / frayed wires.
* Unplug and reconnect the MAF wiring harness a few times to clear the contacts.
* Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information).
* Replace the MAF sensor.

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Posted on Sep 28, 2010

alicantecoli
  • 22095 Answers

SOURCE: 1999 toyota tacoma maf p0100

what you have here is a faulty temperature sensor so its telling the computer the engine is still cold ,right so you know the fault but where this sensor is i have no idea sorry only europeon motors and these of this model are all diesel with mainly manual gearboxes

Posted on Apr 14, 2012

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1 Answer

How to fix p0089 obd code on mitsubishi strada


What is the fuel suction valve? fuel pump? You never stated a year. Did you replace the fuel filter? P0089 is generic code for a fuel problem. What was the fuel pressure? Did the pressure hold for 10+ minutes? What are the symptoms?

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I have change pressure sensor DENSO 6100 on Nissan X-trial 2005 It was p0089 error code now I have two p0089 and p1275


code p 0089 refers to fuel pressure regulator---performance problem===causes fuel pressure regulator---mechanical fault
code p 1275 refers to heated oxygen sensor (HO2S) 1--response time===causes--- HO2S--fuel pressure--injectors--intake air leak--exhaust leak--MAF sensor
as the pressure regulator ( fuel pressure) appears in both codes I would be paying attention to that unit first

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The car stes a P0100 and a P0335 code. The 335 code will reset but the 100 code does not.


p0100 is the mass airflow sensor. You might can clean it with carb cleaner first, if still don't work then replace the sensor.

Dec 16, 2013 | 1996 Mazda Protege

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I have a 2005 cobalt 2.2L. P0240 keeps coming up! I have changed the cat and both 02 sensors! And the codes still comes up! One day I ran some injector cleaner in the fuel tank and cleared the code and it...


code p0240 refers to manifold absolute pressure(MAQP) sensor B TC system--range /performance problem===causes---intake/exhaust leak---hose connections--MAP sensor
Check the exhaust system for leaks especially around the manifolds and gaskets. Check all vacuum hoses for leaks. Finally replace the MAP sensor. Run code reader to reset the CPU

Nov 12, 2013 | Cars & Trucks

1 Answer

07 passat code p0642 related to other codes


code p0642 refers to ECM-knock control defective or sensor reference voltage A circuit low or system voltage- malfunction===causes for ecm is ECM--- for voltage A wiring is short to positive --- for system voltage ---wiring--poor connection--battery---alternator
code p2014 refers to intake manifold air control actuator position sensor/ switch bank 1 circuit malfunction=== causes --wiring --intake manifold air control actuator position sensor/switch
code p0106 refers to manifold absolute pressure MAP sensor/barometric pressure sensor-range/performance problem===causes--intake /exhaust leak--wiring--MAP sensor---Baro sensor.
code p0089 refers to fuel pressure regulator --performance problem===causes--fuel pressure regulator--mechanical fault. I would suggest that you have the battery load tested and the alternator checked for correct output as it may be the common reason for the codes .P0089 will not be electrical as it being a mechanical fault then the regulator needs replacing

Jul 23, 2013 | Cars & Trucks

2 Answers

Code p0100


A code P0100 may mean that one or more of the following has happened:
The MAF may be disconnected, or a wiring connection may be bad. The MAF sensor may be faulty
Possible Solutions: Verify that the Mass Air Flow Sensor wiring is connected properly and that there are no broken / frayed wires. Unplug and reconnect the MAF wiring harness Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information) Replace the MAF sensor.

May 19, 2013 | 2003 Kia Sorento

2 Answers

Nissan sentra 4cyld


Hi, you have provided trouble codes p0100 AND p1605.


Trouble Code: P0100


Mass Airflow Sensor Circuit Malfunction
Possible Causes:



Air Intake leaks located after the MAF sensor assembly MAF sensor signal circuit is open, shorted to ground or power MAF sensor has failed PCM has failed


Trouble Code: P1605

A/T Diagnosis Communication Line Malfunction

Possible Causes:


TCM communication line circuit is open or shorted to ground TCM communication line circuit shorted to VREF or power (B+) TCM or PCM has failed TSB 01-004 (01/01) contains information related to this code
For the P0100, check the connector on top of the MAF sesnor for looseness or corrosion. Connector is on top in piocture below. jturcotte_361.jpg

Mar 25, 2011 | 2000 Nissan Sentra

1 Answer

Error Code P0240 on 2001 Ford Windstar


The catilytic convertor is at fault and needs replacing.
Have it checked first for a 02 sensor can throw this code as well. If the convertor is turning red on the outside it is junk status. Also the engine will sound like its starving for fuel

May 17, 2010 | 2001 Ford Windstar

1 Answer

Error code p0240


Are you sure on the code? Trouble code p0240 is for turbo boost sensor B

Mar 14, 2010 | 1997 Pontiac Sunfire

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P0240 trouble code


Acura code P0240 - Turbo / super charger boost sensor (B) circuit range performances.

It's is best to take it to a certified repair shop, where they can get actual reading's from your Turbo sensor's.
You don't want to drive it that way it will damage your Turbo and there very $$$..

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