Question about 2004 Volvo V50

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Fuel trim 250a Long Term Fuel trim Malfunction

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6ya6ya
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Posted on Jan 02, 2017

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ZJLimited
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SOURCE: what does fault code ECM - 250A long term - fuel trim:upper limit on 2004 volvo S40 mean

Sound like a problem with the MAF sensor, try replace.

Pulled codes for ECM-250A long term fuel trim upper limit, inspected and found air mass sensor failing internally, should show 4 f/s at idle and is showing 2.98 f/s at idle. Recommend replacing with new.



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Posted on Jul 09, 2012

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ZJLimited
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SOURCE: what causes the following faults code on 2004 volvo S40 :ECM-250A LONG TERM-FUEL TRIM:UPPER LIMIT,BCM-0100 COMMUNICATION PROBLEM WITH ECM,EPS-0082 ENGINE STATUS FAULTY SIGNAL,CCM-001 COMMUNICATION CON

Check, test or replace MAF sensor.

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Posted on Jul 09, 2012

Testimonial: "my volvo "check engine light"problem solved after replacing MAF sensor. thanx to FixYa!!!!!!!!! "

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This a picture of the freeze frame for my 99 lexus Rx 300. I would like to know what it means and are these normal parameters?


Yes, looks normal, and good. Calculated load is not much meaning, as it changes constantly. ECT of, oh that is centigrade, not sure how that translates to Fahrenheit, but it may be low from not running long...
Your fuel trims (both short term and long term-STFT, LTFT) are very good-showing that fuel is not being added or subtracted by the computer to maintain correct air/fuel ratio. Fuel trim numbers should be close to zero. It is when fuel trim changes by double digits-either positive or negative-that there is an indicated problem. For example, say you had a vacuum hose leak- sucking in extra air to the engine- then you could see STFT number go positive by double digits-meaning the computer senses a lean condition and is adding fuel to compensate. But your fuel trims show the air/fuel ratio must be correct-no change in fuel trims-the positive 2.3 in LTFT is negligible- not a problem.

Nov 07, 2016 | 1999 Lexus RX 300

1 Answer

I had an diagnostic test done on my 2007 kia optima and it read p0170 fuel trim (bank1) what does this mean


code p0170 refers to two problems
fuel trim bank 1 --malfunction
heated oxygen sensor(HO2S) 3 bank1 --circuit malfunction
for the first error==causes-- intake leak --AIR system---fuel pressure /pump---injectors--EVAP canister purge valve---HO2S
for the second one ===causes=--wiring--HO2S---ECM
The explanation of fuel trim is long winded and you may get some typo errors but I think that you will get the idea
short and long term fuel trim refers to the strategy used to reduce exhaust emissions after a basic computation of injector period, using engine load as a major parameter
both front and rear oxygen sensors signals are used to fine tune the air/fuel mixture by increasing or decreasing the injection period =/- 25% above or below the basic level
any fault requiring a correction beyond this level will result in a fault code being logged ( in this case p0170)
the fuel trim will oscillate the injection period =/- 5% above or below the mean level level A
manufacturing and in-service tolerances of load sensors (MAP,MAF, VAF) and injectors in particular and faults such as intake leaks( vacuum hoses from vent controls and transmission) will affect the air/fuel mixture and cause the trim to compensate
an air intake leak for instance would increase the injection period increasing for example to 115-125%. this level will also oscillate +/- as before level B
this new short term fuel trim level will be stored in the ECM if it is established as a new basic mixture level
It will become a long term fuel trim correction and results in the correct mixture level immediately after starting, even when the HO2S has had sufficient time to heat up
Now having some idea of what trim is, you will see the necessity of repairing any problem sensors ,air leaks ,vacuum leaks
You will also probably understand the reason of why an engine after running short runs ( city driving) feels that it gets more power and better economy after 1/2 hour on the open highway
The ECM resets the trim to the new load power settings and that becomes the new trim

Mar 13, 2015 | 2007 Kia Optima

1 Answer

Ecm 250a volvo


Error description:
ECM-250A Long-term trim - Upper Limit

Feb 05, 2014 | 2008 Volvo C30

1 Answer

What causes the following faults code on 2004 volvo S40 :ECM-250A LONG TERM-FUEL TRIM:UPPER LIMIT,BCM-0100 COMMUNICATION PROBLEM WITH ECM,EPS-0082 ENGINE STATUS FAULTY SIGNAL,CCM-001 COMMUNICATION CONTROL...


Check, test or replace MAF sensor.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Jul 09, 2012 | 2004 Volvo S40

1 Answer

What does fault code ECM - 250A long term - fuel trim:upper limit on 2004 volvo S40 mean


Sound like a problem with the MAF sensor, try replace.

Pulled codes for ECM-250A long term fuel trim upper limit, inspected and found air mass sensor failing internally, should show 4 f/s at idle and is showing 2.98 f/s at idle. Recommend replacing with new.



Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Jul 09, 2012 | 2004 Volvo S40

1 Answer

TROUBLE CODE P 1613 IN WV PASSAT 99


P1102O2S Heating Circuit Bank 1 Sensor 1 Voltage Too Low/Air Leak
P1105O2S Heating Circuit Bank 1 Sensor 2 Short To Positive P1107O2S Heating Circuit Bank 2 Sensor 1 Short To Positive P1110O2S Heating Circuit Bank 2 Sensor 2 Short To Positive P1113O2S Sensor Heater Resistance Too High Bank 1 Sensor 1 P1115O2S Sensor Heater Circuit Short To Ground Bank 1 Sensor 1
P1116O2S Sensor Heater Circuit Open Bank 1 Sensor 1
P1117O2S Sensor Heater Circuit Short To Ground Bank 1 Sensor 2
P1118O2S Sensor Heater Circuit Open Bank 1 Sensor 2
P1127Long Term Fuel Trim B1 System Too Rich
P1128Long Term Fuel Trim B1 System Too Lean
P1129Long Term Fuel Trim B2 System Too Rich
P1130Long Term Fuel Trim B2 System Too Lean
P1136Long Term Fuel Trim Add. Fuel B1 System Too Lean
P1137Long Term Fuel Trim Add. Fuel B1 System Too Rich
P1138Long Term Fuel Trim Add. Fuel B2 System Too Lean
P1139Long Term Fuel Trim Add. Fuel B2 System Too Rich
P1141Load Calculation Cross Check Range/Performance
P1144Mass Air Flow Sensor Open/Short To Ground.
P1145Mass Air Flow Sensor Short To Positive.
P1146Mass Air Flow Sensor Supply Voltage.
P1155Manifold Absolute Pressure Sensor Short To Positive.
P1156Manifold Absolute Pressure Sensor Open/Short To Ground. P1157Manifold Absolute Pressure Sensor Supply Voltage.
P1160Intake Air Temperature Sensor Short To Ground.
P1161Intake Air Temperature Sensor Open/Short To Positive. P1162Intake Air Temperature Sensor Short To Ground.
P1163Fuel Temperature Sensor Open/Short To Positive.
P1164Fuel Temperature Sensor Implausible Signal.
P1171Throttle Actuation Potentiometer Sign. 2 Range/Performance P1172Throttle Actuation Potentiometer Sign. 2 Signal Too Low P1173Throttle Actuation Potentiometer Sign. 2 Signal Too High P1176Rear O2S Correction
P1177O2 Correction Behind Catalyst B1 Limit Attained
P1196O2S Heater Circuit Bank 1 Sensor 1 Electrical Malfunction P1197O2S Heater Circuit Bank 2 Sensor 1 Electrical Malfunction P1198O2S Heater Circuit Bank 1 Sensor 2 Electrical Malfunction P1199O2S Heater Circuit Bank 2 Sensor 2 Electrical Malfunction P1213Injector Circuit Cylinder 1 Short To Positive
P1214Injector Circuit Cylinder 2 Short To Positive
P1215Injector Circuit Cylinder 3 Short To Positive
P1216Injector Circuit Cylinder 4 Short To Positive
P1217Injector Circuit Cylinder 5 Short To Positive
P1218Injector Circuit Cylinder 6 Short To Positive
P1225Injector Circuit Cylinder 1 Short To Ground
P1226Injector Circuit Cylinder 2 Short To Ground
P1227Injector Circuit Cylinder 3 Short To Ground
P1228Injector Circuit Cylinder 4 Short To Ground
P1229Injector Circuit Cylinder 5 Short To Ground
P1230Injector Circuit Cylinder 6 Short To Ground
P1237Injector Circuit Open Cylinder 1
P1238Injector Circuit Open Cylinder 2
P1239Injector Circuit Open Cylinder 3
P1240Injector Circuit Open Cylinder 4
P1241Injector Circuit Open Cylinder 5
P1242Injector Circuit Open Cylinder 6
P1245Needle Lift Sensor Short To Ground
P1246Needle Lift Implausible Signal
P1247Needle Lift Sensor Open/Short To Positive
P1248Start Of Cold Start Injector Control Difference
P1251Start Of Cold Start Injector Short To Positive
P1252Start Of Cold Start Injector Open/Short To Ground
P1255Engine Coolant Temperature Sensor Short To Ground
P1256Engine Coolant Temperature Sensor Open/Short To Positive P1300Misfire Detected, Fuel Level Too Low
P1250Fuel Level Too Low P1325Cyl. 1 Knock Control Limit Attained
P1326Cyl. 2 Knock Control Limit Attained
P1327Cyl. 3 Knock Control Limit Attained
P1328Cyl. 4 Knock Control Limit Attained
P1329Cyl. 5 Knock Control Limit Attained
P1330Cyl. 6 Knock Control Limit Attained
P1336Engine Torque Adaption At Limit
P1337CMP Sensor Bank 1 Short To Ground
P1338CMP Sensor Bank 1 Open Circuit Or Short To Positive P1340CKP/CMP Sensor Signals Out Of Sequence
P1341Ignition Coil Output Stage 1 Short To Ground
P1343Ignition Coil Output Stage 2 Short To Ground
P1345Ignition Coil Output Stage 3 Short To Ground
P1354Modulating Piston Displacement Sensor Electrical Circuit Malfunction
P1386Internal Control Module Knock Control Error
P1387Control Unit Internal Altitude Sensor
P1391CMP Sensor Bank 2 Short To Ground
P1392CMP Sensor Bank 2 Open Circuit/Short To Positive
P1393Ignition Coil Power Output Stage 1 Malfunction
P1394Ignition Coil Power Output Stage 2 Malfunction
P1395Ignition Coil Power Output Stage 3 Malfunction
P1401EGR Valve Power Stage Short To Ground
P1402EGR Vacuum Regulator Solenoid Valve Short To Positive P1403EGR System Control Difference
P1407EGR Temperature Sensor Signal Too Low
P1408EGR Temperature Sensor Signal Too High
P1410Tank Ventilation Valve Circuit Short To B+ P1420Secondary Air Injection Control Module Electrical Malfunction P1421Secondary Air Injection Valve Circuit Short To Ground P1422Secondary Air Injection Valve Circuit Short To B+ P1424Secondary Air Injection System Bank 1 Leak Detected P1425Tank Ventilation Valve Short To Ground P1426Tank Ventilation Valve Open Circuit P1432Secondary Air Injection Valve Open P1433Secondary Air Injection Pump Relay Circuit Open P1434Secondary Air Injection Pump Relay Circuit Short To Positive P1435Secondary Air Injection Pump Relay Circuit Short To Ground P1436Secondary Air Injection Pump Relay Circuit Electrical Malfunction P1440EGR Valve Power Stage Open P1441EGR Vacuum Regulator Solenoid Valve Open/Short To Ground P1450Secondary Air Injection System Circuit Short To Positive P1451Secondary Air Injection Circuit Short To Ground P1452Secondary Air Injection System Circuit Open P1471EVAP Control System LDP Circuit Short to Positive P1472EVAP Control System LDP Circuit Short To Ground P1473EVAP Control System LDP Open Circuit P1475EVAP Control System LDP Malfunction/Signal Circuit Open P1476EVAP Control System LDP Malfunction/Insufficient Vacuum P1477EVAP Control System LDP Malfunction P1478EVAP Control System LDP Clamped Tube Detected P1500Fuel Pump Relay Electrical Circuit Malfunction P1501Fuel Pump Relay Circuit Short To Ground P1502Fuel Pump Relay Circuit Short To Positive P1505Closed Throttle Position Does Not Close/Open Circuit P1506Closed Throttle Position Switch Does Not Open./Short To Ground P1512Intake Manifold Changeover Valve Circuit Short To Positive P1515Intake Manifold Changeover Valve Circuit Short To Ground P1516Intake Manifold Changeover Valve Circuit Open P1519Intake Camshaft Control Bank 1 Malfunction P1522Intake Camshaft Control Bank 2 Malfunction P1537Fuel Cut-off Valve Incorrect Function P1538Fuel Cut-off Valve Open/Short To Ground P1539Clutch Pedal Switch Signal Fault P1540VSS Signal Too High P1541Fuel Pump Relay Circuit Open P1542Throttle Actuation Potentiometer Range/Performance P1543Throttle Actuation Potentiometer Signal Too Low P1544Throttle Actuation Potentiometer Signal Too High
P1545Throttle Position Control Malfunction P1546Wastegate Bypass Regulator Valve Short To Positive P1547Wastegate Bypass Regulator Valve Short To Ground P1548Wastegate Bypass Regulator Valve Open P1549Wastegate Bypass Regulator Valve Open/Short To Ground P1550Charge Pressure Control Difference P1555Charge Pressure Upper Limit Exceeded P1556Charge Pressure Negative Deviation P1557Charge Pressure Positive Deviation P1558Throttle Actuator Electrical Malfunction P1559Idle Speed Control Throttle Position Adaption Malfunction P1560Maximum Engine Speed Exceeded P1561Quantity Adjuster Control Difference P1562Quantity Adjuster Upper Stop Value P1563Quantity Adjuster Lower Stop Value P1564Idle Speed Control Throttle Position Low Voltage During Adaption P1565Idle Speed Control Throttle Position Lower Limit Not Obtained P1568Idle Speed Control Throttle Position Mechanical Malfunction P1569Switch For CCS Signal Faulty P1580Throttle Actuator B1 Malfunction P1582Idle Adaptation At Limit P1600Power Supply Terminal No. 15 Low Voltage P1602Power Supply Terminal No. 30 Low Voltage P1603Internal Control Module Self Check P1606Rough Road Spec. Engine Torque ABS-ECU Electrical Malfunction P1611MIL Call-Up Circuit/TCM Short To Ground P1612Engine Control Module Incorrect Coding
P1613MIL Call-Up Circuit Open/Short To Positive P1616Glow Plug Indicator Lamp Short To Positive P1617Glow Plug Indicator Lamp Open/Short To Ground P1618Glow Plug Relay Short To Positive P1619Glow Plug Relay Open/Short To Ground P1624MIL Request Signal Active P1626Data Bus Drive Missing Command From M/T P1630Accelerator Pedal Position Sensor 1 Signal Too Low P1631Accelerator Pedal Position Sensor 1 Signal Too High P1632Accelerator Pedal Position Sensor 1/2 Supply Voltage P1633Accelerator Pedal Position Sensor 2 Signal Too Low P1634Accelerator Pedal Position Sensor 2 Signal Too High P1639Accelerator Pedal Position Sensor 1/2 Range Performance P1640Internal Control Module (EEPROM) Error P1648CAN-Bus System Component Failure P1649Data Bus Powertrain Missing Message From Brake Controller P1676Drive By Wire MIL Circuit Electrical Malfunction P1677Drive By Wire MIL Circuit Short To Positive P1678Drive By Wire MIL Circuit Short To Ground P1679Drive By Wire MIL Circuit Open Circuit P1681Control Module Programming Not Finished P1686Control Unit Error, Programming Error P1690MIL Malfunction P1691MIL Open Circuit P1692MIL Short To Ground P1693MIL Short To Positive P1778Solenoid EV7 Electrical Malfunction P1780Engine Intervention Readable P1851Data Bus Drive Missing Command From ABS P1854Drive Train CAN-Bus Inoperative

Read more at: https://www.obd-codes.com/trouble_codes/volkswagen/
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Apr 03, 2012 | Volkswagen Passat Cars & Trucks

1 Answer

2002 Ford Mustang GT I used OBD-II to get the trouble codes, I got P0174,P0301,P302,P316 Freeze Frame Information: 1. DTC for which Freeze Frame was Stored - P0174 2. Fuel System 1 Status - Closed...


Because you got a misfire on cylinder #1 PO301
A misfire on cylinder #2 PO302
Misfires first 1000 rev PO316
O2 Codes PO 174
Etc,Etc


The LTT, is the result of not learning (yet-thus long term)
what isn't working correctly---Your Engine

Replace bad Coil--which ever is missing
Do not go by the codes,alone ,TEST

Dec 10, 2010 | 2002 Ford Mustang

2 Answers

Function of oxygen sensor?


It measures the oxygen in the exhaust system, for instance, if the fuel is to rich it sends values to the computer and the computer will adjust the fuel and timing to bring it back into perimeters

Jun 20, 2010 | 2003 Mitsubishi Galant

2 Answers

What is a STFT B1(%) -1.56. WHAT DOES THAT MEAN?


Here is some general information to get you started...
(I am quoting directly from several PDF sources, Googled).

STFT B1 = Short Term Fuel Trim Bank 1. This is the fuel correction percentage being used by the closed loop fuel strategy for Bank 1 (if a V style engine or for all cylinders if an inline engine). If the fuel system is in open loop, this number will be reported as 0%

Fuel trim refers to the feedback compensation value compared against the basic injection time. Fuel trim includes short–term fuel trim and long–term fuel trim.

Short–term fuel trim is the short–term fuel compensation used to maintain the air–fuel ratio at its ideal theoretical value. The signal from the heated oxygen sensor indicates whether the air–fuel ratio is RICH or LEAN compared to the ideal theoretical value, triggering a reduction in fuel volume if the air–fuel ratio is rich, and an increase in fuel volume if it is lean.

Long–term fuel trim is overall fuel compensation carried out long–term to compensate for continual deviation of the short–term fuel trim form the central value due to individual engine differences, wear over time and changes in the usage environment.

If both the short–term fuel trim and long–term fuel trim are LEAN or RICH beyond a certain value, it is detected as a malfunction and the check engine warning (CHK ENG) lights up.

If the total of the short–term fuel trim value and long–term fuel trim value is within ± 25 %, the system is functioning normally.

Apr 07, 2010 | 1998 Jeep Grand Cherokee

1 Answer

P1165 code in my 2001 hyundai santa fe?


I'm not quite sure about the code in Hyundai's case but it definitely relates to fuel trim...

I could try to hash down the explanation for Short term fuel trim and Long term fuel trim in this post but I think a visit to
http://www.wellsmfgcorp.com/pdf/counterp_v6_i4_2002.pdf
would be more thorough and appropriate.

Basically, a high value of long term fuel trim indicates that your engine has had and will have to continue to inject a lot more or a lot less fuel to attain the correct air/fuel ratio for a proper burn, which mainly indicates a malfunction somewhere (could be lots of things)

Aug 27, 2008 | 2001 Hyundai Santa Fe

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