Codigo p0171

En los motores de y cilindros, el banco corresponde al lado del motor que tiene el cilindro 1. The Engine Control Module ( ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.

In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up. Ambos son códigos magras es decir, los sensores de Oestaban leyendo una condición pobre. Rich Mixture = Too much fuel, not enough air. Lean Mixture = Too much air, not enough fuel. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter.

User Submitted Video - Fuel injection system does not operate properly. The amount of mixture ratio compensation is too small. A lean condition occurs when the engine either receives too little fuel or too much air.

Nearly all Toyota gasoline engines strive for a 14. Refer to our Oxygen Sensor Code Diagnosis article for a list of all possible causes.

My driving conditions are about city, highway, which I think is a common ratio for most of us. If anything, more city driving means more stress on the engine, so the fix is definitely holding up. I have had the pleasure of talking with some of you who have performed this procedure,. This could be due to a failing pump, check valve, Mass Air Flow sensor (MAF – specifically for the secondary air system), clogged ports in the cylinder head (becoming a common issue, unfortunately) and other system control issues. L equipped car, pick up, van or SUV.

Mejor respuesta: Este problema pueden ser varios factores pero lo principal es que no hay suficiente suministro de gasolina en el riel de los inyectores. Another option you can try is buying gas at a different station. Osensor is functioning properly.

ALEJANDRO de Argentina hace años. Checale la presion de la gasolina o los. Descripcion y forma de interpretar codigos desde un lector de codigos OBDII, mecanica automotriz OBD II - Mecanica Automotriz - pag. The charcoal canister and vacuum hoses are all under the hood. So no need to mess with the tank for a vacuum leak.

However, the raw gas smell could be coming from near the tank. I replaced the intake manifold and they still show. They told me the description was Fuel control readings not as expected.

I believe those correspond to a lean condition on bank sensor and bank sensor 2. Truck still running smooth. I did try to unplug MAF sensor while truck was running and it killed. After exausting all the suggestions recieved from fellow members and talking to mechanics (each mechanic, different solution) I found where the problem was. Heated Oxygen Sensor Circuit Malfunction Bank Sensor 2).

Dirty or defective MAF is first suspect. Automotive computers and error codes are a blessing and a curse for mechanics. The fuel pump regulator could be allowing the wrong amount of pressure to be pumped to the fuel injectors. If a fuel filter is clogged or restricted this can alter the amount of fuel that reaches the injectors also.

Fuel pressure is not likely to cause lean conditions though,. Average repair cost is $2at 107miles. Thank You for the Donation. I would check for vacuum leaks on the drivers side of the engine. Problem is, one of those codes is causing the other.

Ford F1check engine bankand bank2. Evidently Ford saw fit to put parts in the engine that cannot take oil. The black-shouldered bolts are problematic it this regard.

For Lincoln and Mercury cars and trucks: Air or vacuum leak, Oxygen Sensor or Mass Air Flow Sensor.

Chevy or any GM vehicles: Air or vacuum leak or Mass Air Flow. I tested all other components, and they were good. The problem is most likely caused by a ruptured diaphragm in the PCV valve. To make sure, start the engine and wait until it makes the whistling sound.

With the computer hooked up, if there is a specific cylinder(s) running lean, It should show up on the data report. The MAF (Mass Air Flow) Sensor is dirty or faulty. Cleaning the MAF sensor with electronics cleaner (comes in a spray can) may resolve this issue. Possible vacuum leak downstream of the MAF sensor. You should inspect all vacuum and PCV hoses.

The site for Ford truck owners, by Ford truck owners. The light is on soli not blinking. Took it to the Ford place to have brake work done and diagnose the Check Engine Soon light. I have replaced the upper and lower intake gaskets, PCV, IAC, MAF. Vehicle had fault codes for lean fuel system, both banks.

This indicates a problem affecting the entire engine. With fuel trim faults, freeze frame data is a great starting point. Freeze frame data indicates fault codes set at idle. Monitoring fuel trim during a test drive confirmed the vehicle was lean at idle. Would you like to merge this question into it?

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