Question about 2000 Ford Focus

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Yellow engine light on

Last time , same problem, was engine air modulator dirty. Cleaned it, and all ok. Could it be same again?

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Most likely it is not the same problem as before. the ONLY way to know for sure is to connect the car to an ODBC II code reader or take the car to a mechanic and have the codes read to know for sure.

Posted on Nov 07, 2008


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Posted on Jan 02, 2017


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2 Answers

Prius code p1112

no clean it , use CRC Maf sensor cleaner, from 12" distant
carefully .
the maf can last the life of an engine, 300k, easy, if cleaned time to time... at the 30k service?
first google hit P1 means toy only code, (factory)
P2112 Toyota - Throttle Actuator Control System - Stuck Closed

Possible causes
- Throttle Body Plate Binding
- Faulty Throttle Actuator
- Throttle Actuator harness is open or shorted
- Throttle Actuator circuit poor electrical connection

Jan 22, 2014 | Toyota Cars & Trucks

1 Answer

What can I do to fix these codes from recent inspection?

P0300 is a random engine cylinder misfire has been detected by the control computer of the system, it is called the PCM. Common causes are dirty fuel injectors, engine intake manifold vacuum leaks with poor quality fuel as the last item. Other issues cause this problem as well including general condition of the engine like low compression, only careful testing and diagnosis will find the exact cause or causes.
P0420 Catalyst System Efficiency Below Threshold
This indicates that your Catalytic Converter is not cleaning up the exhaust emissions to a preset level, it is mionitored again by the PCM.
Possible causes are engine vacuum leaks (may be related to P0300 problem), exhaust leaks upstram of the Catlytic Converter
All poss causes are listed below.
Possible causes - Three way catalyst converter Bank 1
- Exhaust tube leaking
- Intake gasket vacuum leaks
- Fuel injectors may be faulty
- Fuel injector leaks
- Spark plugs may be faulty
- Improper ignition timing
- Powertrain control module (PCM)

P0507 Automatic engine Idle speed Control System RPM Higher Than Expected idle speed during test.
Possible causes - Dirty throttle body
- Electric throttle control actuator misadjusted or damaged
- Faulty Electric throttle control actuator
- Intake air leak
- Poor electrical connection to the Intake Air Control (IAC) valve

Dec 14, 2011 | Cars & Trucks

1 Answer

My wife's 2000 Toyota Corolla died today when she was at a stop light. She had to start it again and was able to drive but it has some hesitation problems and poor acceleration at times. I did remove...

the po300 code is for a cylinder misfire, usually followed by a last number of 1 2 3 ect, showing which cylinder is misfiring, normally this can be fixed by installing a new set of plugs, the po171 code could be this
  • The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
  • There could be a vacuum leak downstream of the MAF sensor. you cleaned that but it could be fouling out you could also have this happening
    • Inspect all vacuum and PCV hoses, replace if necessary
    • Check for a dirty fuel filter and proper fuel pressure

Jun 21, 2011 | 2000 Toyota Corolla

2 Answers

Engine dies at stop lights

very open question but its usually the idol control sensor. its attached to a cable usually open in the engine compartment. pulling this cable which goes back into the firewall will rev the engine. once you find the cable, find the bolt that attaches to the cable and tighten the cable, this will ajust at what RPM the car idols at and keep it from stalling when you let off the gas.

Mar 07, 2011 | Saturn SC2 Cars & Trucks

1 Answer

When driving round town, car OK. When on M/Way if the RPM's exceed 2500- 3000 the engine will not pull and perfomance goes flat. When cold and directly on M/Way goes ok for 1st 5miles then flat...


Sopunds like either 1 of 3 things

Air mas sensor
EGR valve "exhaust gas recycler" valve
throttle control module.

Most likely the one of the first 2, check for air leaks as well. air mass is cheapest part, EGR and air mass can often be cleaned and work fine again. do you get an engine light at all?
if so then I would say have the EGR checked.


Jan 14, 2011 | 2004 Audi A4

2 Answers

2006 trailblazer 4x4 4.2, stalls while driving. Engine shuts down, whenever and wherever it feels like it. No pattern other than about every 2-5 miles, has worsened to this point over last 10 days....

ok well try this when it stalls see if spark is present and if it is not and it cools down and starts then you might need to replace ignition control module good luck

Aug 08, 2009 | 2006 Chevrolet Trailblazer

1 Answer

Code-12 (VAF)

GOOD! I assume the CHECK ENGINE (yellow) light comes on!... correct? Whenever the "Check Engine" light comes on, there is always a DTC (Diagnostic Trouble Code) stored in the ECM (Engine Control Module). You'll need an OBDII (On-Board-Diagnostics) scanner to retrieve any codes recorded/set in ECM. Once you do this and let us know what, if any codes are set, then we can go from there.

Jun 24, 2009 | 1994 Hyundai Excel

3 Answers

My 1999 dodge durango is having hard time starting and then won't stay running.

I had a simmilar problem with a RAM the throttle body was dirty.You may try cleaning the intake with a good carb spray.This may not have happened to you but my battery had gone dead and when I replaced it my vehicle would not run well (dying out).I clened the intake and it runs fine.A mechanic told me that when a vehicle loses power (battery)the computer resets and if the intake is dirty the fuelwill not flow well therefore causing the computer to send more or less fuel to the throttle body.Although after cleaning it my o2 sensor needed to be cleaned and reset the check engine light

Mar 09, 2009 | 1999 Dodge Durango

2 Answers

2005 Chevrolet Cavalier, No power

check air intake hose first, including MAF sensor (if dirty must clean) , then check for all other hoses for leaks and last but not least check air filter.

Feb 19, 2009 | 2005 Chevrolet Cavalier

1 Answer

P0505 Code

First make sure that your wires to you iac(idle air control) motor are ok. Also that the pins in the connectors are not damaged. Most likeley you need to replace the iac motor and follow a relearn procedure for the pcm.(powertrain control module)
The iac is most likely stuck in the extented position causing it to starve for air. You have to hold your foot on the gas to keep the throttle plate open enough to let air by for the engine to run.

Jun 15, 2008 | 2000 Nissan Maxima

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