Remote start stopped working and check engine light went on.
We purchased this car 2 weeks ago and the remote start was working fine. We drove it today to several places and used the remote start and it worked until our last stop and it would not start. The check engine light is on and my husband put a code reader on it. The codes are PO171 and PO174. Can you help us get this working again? We have checked to make sure doors and windows are closed, trunk and hood closed.
My car has 45000 miles.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
Hi there. The codes are referring that that both banks on the engine are reading a lean condition. For a lean condition to occur, the fuel system is not functioning properly. Check the fuel pump, fuel pump relay, and the fuel injectors to see what is not working. If the injectors have power to them, then check for fuel pressure on the fuel rail. If there is no fuel pressure on the fuel rail, then check the fuel pump relay and feel if its clicking. If the relay is not clicking, then remove the relay and check for a power to the relay. If there is power to the relay, then either the relay is not working or the fuel pump is not working. If there is no power to the relay, then the ignition system has it locked out. Since the vehicle has a remote start system, it may have the vehicle’s fuel system locked out. If you need further assistance with your engine not starting, then seek out a professional, such as one from Your Mechanic, to help you.
How to Identify and Fix Common car Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
What is code P0174? The Diagnostic trouble code (DTC) P0174 indicates `System Too Lean (Bank 2). ` The P0174 engine code indicates that the air-fuel ratio in your vehicle is too lean. Before the gas in your car can combust and power your vehicle, it must first combine with oxygen.
When your powertrain/engine control module receives a reading that indicates there`s too much oxygen and the ratio is incorrect, it sends an error code P0171 or P0174. Depending on the problem, it may send both codes if the issue is causing a lean condition on both engine banks.
A trouble code P0171 or P0174 means the oxygen sensor or Air-Fuel Ratio (AFR) sensor (in bank 1 [P0171] or bank 2 [P0174]) has detected a lean fuel mixture: either too much air or not enough fuel is going into the engine.
A P0171 code is set by your vehicle`s powertrain control module (PCM) when it detects that the air-to-fuel ratio of your vehicle is too lean. This means that the PCM is relaying that the engine is receiving too much air into the combustion chamber and not enough fuel.
What the P0174 code means. Code P0174 indicates that there is a lean condition detected by the Engine Control Module (ECM). A lean condition will be created if there is too much air, and not enough fuel, in the air fuel ratio (AFR).
You probably know that the answer the questions is — no! A P0171 or P0174 lean code with an O2 sensor reading lean all the time mean — well, several things. The real problem may not be a bad O2 sensor, but possibly be an engine vacuum leak, low fuel pressure or dirty fuel injectors that are causing the engine run lean.
No, either an air leak,low fuel pressure or a dirty fuel injectors can cause it. In my car it was caused by a bad fuel pressure regulator,I also got a P0174 which was for the right hand engine bank..
P0174 definition: Bank 2 has too much air or not enough fuel. Issue Severity: MODERATE– Extended driving with this code can cause internal engine damage. Repair Urgency: Get this code fixed as soon as possible.
When the ECM/PCM is having to add too much fuel based on input from the O2 sensor, the fault code P0171 will be sent to the ECM, which will trigger the check engine light to illuminate. This code could either mean that the oxygen sensor is detecting too much oxygen or too little fuel in the mixture.
The most common fault codes associated with a clogged fuel injector are P0171 and P0174, which indicates the engine controller is seeing a lean condition.
Fuel System Issues
A failed fuel pressure sensor, pump, or clogged fuel filter can cause the P0171 trouble code.
What are the symptoms of a P0174 code? Generally, a lean code will cause the engine to run poorly, which the driver will notice as a high idle, a misfire, a lack of power, or even engine stalling, and this may happen before the check engine light has turned on.
P0174 Causes
Below are some common causes of the error code P0174: A vacuum leak due to a damaged intake manifold gasket or a punctured vacuum hose. A malfunctioning mass airflow sensor (MAF sensor) A clogged fuel filter or weak fuel pump.
That means your engine is getting too much air and not enough fuel.
Your car or truck has either a P0171, P0174 lean fault code or both stored in the pc, these codes derive from Oxygen Sensor (O-2) readings. A lean code or codes suggest that there surely is too-much air in the exhaust.
P0171 Causes
Some of the common causes for the DTC P0171 fault code include: A faulty fuel pressure regulator. A weak fuel pump. A clogged fuel filter.
The P0156 code sets when Sensor 2 on the Bank 2 side of the engine is malfunctioning. If the oxygen sensor remains at a low voltage for an extended period, or just simply ceases to emit readings, the P0156 code will be triggered by the ECM.
Too much air or insufficient fuel in the fuel-air mixture is called a “lean” condition. Fault code P0171 usually occurs when a vacuum leak is present or the fuel system is running weak.
If a clogged fuel injector continually struggles to disperse fuel to the engine, a time will come when it misses the fuel supply completely and the engine will misfire. The misfire will easily be felt while driving, and often requires immediate repair by trained automotive repair specialists.
This code is a crankshaft position sensor failure. It would have nothing to do with the catalytic converter. It can cause issues with starting the vehicle and keeping the engine running, which may have an effect on the exhaust system. A failing cat can also cause stalling, so without the code, they could look similar.
Imbalanced Air-fuel Ratio or Lean Misfire
An imbalance in the air-fuel ratio or lean misfire, as it is also called, can cause your car to misfire. You will feel the misfire more when the car is idling as opposed to when the engine picks up speed and the car is running.
An overly dirty filter restricts airflow into your engine, often leading to rich fuel conditions. By replacing your air filter, you should not only restore an ideal air-fuel ratio, but also the problems associated with excessive EGR system flow.
A dirty air filter can cause your vehicle to throw a Check Engine code. During this instance, the Check Engine Light of your vehicle will turn on. The light turns on because your vehicle is sensing that its engine isn`t receiving enough air.
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ANSWER : Hi there. In both cases, when an AC system is not working and a warning light is coming on the dashboard, typically a professional mechanic will complete the same initial inspection, which is to download the stored error codes that triggered the warning light initially. This tends to give them an idea as to what is causing the problems. This could be something as simple as an electrical relay that is faulty or loose or an indication of a computer related "glitch". Either way, the best way to move forward is to have a professional mobile mechanic complete a check engine light inspection.
Read Full Q/A … : Remote start stopped working and check engine light went on.
Remote start stopped working and check engine light went on.
ANSWER : Hi there. The codes are referring that that both banks on the engine are reading a lean condition. For a lean condition to occur, the fuel system is not functioning properly. Check the fuel pump, fuel pump relay, and the fuel injectors to see what is not working. If the injectors have power to them, then check for fuel pressure on the fuel rail. If there is no fuel pressure on the fuel rail, then check the fuel pump relay and feel if its clicking. If the relay is not clicking, then remove the relay and check for a power to the relay. If there is power to the relay, then either the relay is not working or the fuel pump is not working. If there is no power to the relay, then the ignition system has it locked out. Since the vehicle has a remote start system, it may have the vehicle’s fuel system locked out. If you need further assistance with your engine not starting, then seek out a professional, such as one from Your Mechanic, to help you.
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Read Full Q/A … : Remote start stopped working and check engine light went on.
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Read Full Q/A … : Remote start stopped working and check engine light went on.
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Read Full Q/A … : Remote start stopped working and check engine light went on.
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If you need further assistance with your check engine light on, then seek out a professional, such as one from Your Mechanic, to help you.
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Read Full Q/A … : Remote start stopped working and check engine light went on.
