Where are the sensors located
P0156 - HO2S Sensor Circuit Malfunction (HO2S-22)
P0136 - HO2S Sensor Circuit Malfunction (HO2S-12)
The downstream HO2S sensor(s) are continuously checked for maximum and minimum voltages. The test fails when the voltages fail to meet the calibrated limits.
P1131 - Lack of HO2S-11 Switch, Sensor Indicates Lean
A HEGO sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.
See Possible Causes for DTC P1130
P1130 - Lack of HO2S-11 Switch, Fuel Trim at Limit
The HEGO Sensor is monitored for switching. The test fails when the HO2S fails to switch due to circuit or fuel at or exceeding a calibrated limit.
A fuel control HO2S PID switching across 0.45 volt from 0.2 to 0.9 volt indicates a normal switching HO2S.
Looks like you have an oxygen sensor problem ! This stuff mite look Greek to you, do you have obd 2 scanner that can read engine data ? You mite look at alldata for a service info subscription for your car. cost about $16.00 for a year . go to http://www.alldata.com/repair for diyer
See DTC P0136
P0156 - Problem with 0/2 circuit for downstream sensor of the front bank.
P1131 - Low activity of the upstream sensor for bank one. (rear)
P0115 - Problem with circuit for coolant temp sensor.
Just because you have codes for these sensors doesn't mean the sensor is the reason. The code merely tells you there is an issue in the circuit that needs to be troubleshooted accurately.
SOURCE: i have error codes p0156 p0161
Check the wire harness near the top of the engine in the rear. They were good for rubbing through on the trans fill tube bracket. Judging by the code you have 4 sensors. you would be interested in the drivers side rear sensor.
SOURCE: 98 E-250 Rough Idle; codes p0156,p1131,p1151,p0301,p0171,p0174+
po301 thru po306 all misfire codes cylinder 1-6 remove plugs and replace them..... set the plug gap first
i suggest u replace the wires also if they never been replaced all these misfire codes can set the others and one is for the oxygen sensor ( 02s or HO2S) CIRCUT MALFUNCTION do u know how to check wireing systems
do the tune up plugs (set gap) .052-.056 change the fuel filter also. clear the codes hows it run
this info is for 98 E-250 4.2Litre
what engine do u have 4.2L or 4.6L i know it is a v-6 by the codes
SOURCE: what does computer code p1131 manufacturing control fuel air metering mean
Code p1131 manufacturer control fuel air metering, on a 2003 Ford Taurus. Where is part? Is there an easy way to see if it can be fixed without buying the expensive part?
SOURCE: P1131 code Fuel Acturer control - Fuel air metering
In almost every Ford Product from 1990 to 1999 the most likely cause is the Mass Air Flow (MAF) Sensor.
Auto manufacturers have a cleaning cycle built into the MAF circuit. How it works is this; when the key is turned off a larger current is sent through this hot wire causing it to glow red hot, thus burning off any contaminants. Well, almost all auto manufacturers that is.
MAF sensors can get contaminated from a variety of sources: dirt, oil, silicon, spider webs, potting compound from the sensor itself, etc. When a MAF sensor gets contaminated, it skews the transfer function such that the sensor over-estimates air flow at idle (causes the fuel system to go rich) and under-estimates air flow at high air flows (causes fuel system to go lean). This means Long Term Fuel Trims will learn lean (negative) corrections at idle and learn rich (positive) corrections at higher air flows.
To confirm this disconnect the MAF sensor connector. This puts the vehicle into Failure Mode and Effects Management (FMEM). In FMEM mode, airflow is inferred by using rpm and throttle position instead of reading the MAF sensor. (In addition, the BARO value is reset to a base/unlearned value.) If the lean driveability symptoms go away, the MAF sensor is probably contaminated and should be replaced. If the lean driveability symptoms do not go away the MAF sensor is probably not contaminated.
When this happens Ford says you must replace the MAF since they cannot be repaired. With a dealer cost of about $177.00 and about 1.5 hours of labor the repair is not very expensive. However Ford is not correct. This problem can be fixed and it can be done by just about anyone.
What you need to do is go to the local Radio Shack and get a can of spray tuner cleaner, #64-4315. Or a MAF cleaner at any Auto Parts store. Disconnect the NEGATIVE battery cable and remove the MAF from the vehicle. Spray the inside of the MAF with the tuner cleaner. Be very careful when you spray the hot wire. It is very thin and if it breaks, you will have to replace the MAF. Clean it well and let it air dry for 15 or 20 minutes.
Don't use carburetor or brake cleaner. They leave a residue and you will be right back where you started. Use ONLY the tuner cleaner, MAF cleaner which dries residue free. When it's dry put it back in the vehicle and reconnect the NEGATIVE battery cable. You will need to drive the vehicle several miles to let the PCM "relearn" your specific driving conditions. Once that is done the codes will not come back and you should notice all the symptoms are gone as well.
Good luck and keep me posted, be glad to help you get your car running 100% soon.
SOURCE: Getting P1151 and P1131 codes on my 98 Ford
No that is it, More then likely your 02 sensor needs to be replaced.
But other possible causes would be excessive fuel pressure, leaking/contaminated fuel injectors, leaking pressure regulator, low fuel pressure or running out of fuel, vapor recovery system.
Other possible causes could be: Air leaks after the MAF, vacuum leaks.
Possible causes PVC system:
improperly seated engine oil dip-stick.
Possible causes EGR system:
Leaking gasket, stuck EGR valve, leaking diaphragm or EVR.
Possible causes Base engine:
Oil over filled, cam timing, cylinder compression, exhaust leaks before or near H02S(s).
I know its a lot of info but it could be anything. Take your time, good luck. Let me know how it is going.
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