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P0171

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P0171 OBD-II Trouble Code: System Too Lean (Bank 1)
P0171 code definition System Too Lean (Bank 1) What the P0171 code means The P0171 OBD-II code means that, on the first...

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P0171
The code P0171 (https://www.yourmechanic.com/article/p0171-obd-ii-trouble-code-system-too-lean-bank-1-by-andrew-quinn) is due to the left bank of the engine running lean and has reached the rich limit for the ECM. Try to have the injectors cleaned (https://www.yourmechanic.com/article/how-to-use-a-fuel-injection-cleaning-kit-by-ed-ruelas) and run only high quality fuel that has cleaning...
Check engine light on.
The testing you did using the CIL may not have been done correctly. During these tests you will need to cycle the clutch and accelerate the engine when the separator codes were received. This is done with a superstar 2...
Check engine light is on with codes p0171 lean condition and p0303 cylinder 3 misfire
You did the right thing in checking for vacuum leaks, but I would take another good hard look at that. Not necessarily with the carb clean, but with the eyeballs. If there is a bad fit at the air mass...
2001 bmw 325xi P0174 and P0171 code,just had a tune up and one coil replaced car is stalling down,vibration and idle down when pre
The two codes that you have provided suggest these possibilities, at minimum, which possibilities may exist alone or in combination: an air leak after the mass air flow (MAF) sensor, such as a torn intake boot, or bad intake manifold...
2007 RR Supercharged. The check engine light came on. Code p0171 and p0173. Oxygen sensor bank 1 and 2. Checked the battery.
Hi there. The check engine light codes are for the engine running lean on bank one and bank two. Check the fuel injectors to see which injectors are not working. A lean condition is when the fuel injector(s) are not...
Remote start stopped working and check engine light went on.
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...
Got a trouble code P0171.
The purpose of the No. 2 sensor is to monitor the efficiency of the catalytic converter. Consequently, if everything is functioning correctly, the No. 2 sensor is supposed to report a constant voltage. If the No. 2 sensor waveform mimicked...
What could be the cause of code P0171
PO171 occurs when the fuel mixture has gotten so lean that it is out of the range that the ECU can compensate. It can be accompanied by poor idle quality, weak performance and even stalling. While Oxygen sensor number 1...
The gasket is deteriorated in the intake manifold gasket
If the gasket does have to be replaced it is replaced as a "whole". There is no partial intake manifold gasket. Please note that the code you are writing in about, Diagnostic Trouble Code P0171 (https://www.yourmechanic.com/article/p0171-obd-ii-trouble-code-system-too-lean-bank-1-by-andrew-quinn), can set for many...
P0404, P0405, P0171, P0174
Hello. Thank you for writing in. Due to the p0405 code (https://www.yourmechanic.com/article/p0405-obd-ii-trouble-code-exhaust-gas-recirculation-sensor-circuit-a-low-by-jay-safford), you will want to start by replacing the sensor. This is typically easier and cheaper than replacing the EGR unit all together. If the light continues to illuminate,...
Engine light on with P0171 code
The cause behind diagnostic trouble code P0171 (https://www.yourmechanic.com/article/p0171-obd-ii-trouble-code-system-too-lean-bank-1-by-andrew-quinn) is easiest to find by looking at the secondary firing patterns on the Bank one cylinders. That will confirm if the too lean condition, that has caused the code to set, affects...
Check engine light
Hello. P0171 is the trouble code for a lean condition at bank 1. This can be caused by a wide variety of issues, primarily issues with the engine management or fuel systems, and therefore can sometimes be difficult to diagnose....
my car has code p0442 and p0171 2003 suzuki aero. check engine light is on and it stalls occationally when i take my foot off the
Hello, thank you for writing in. The most recent issue with stalling may have triggered additional codes, and the vehicle should be scanned again for a more accurate idea of where to start with diagnostics. From there you can start...
I have a Po171 code on a 2006 trailblazer
The cause behind diagnostic trouble code P0171 (https://www.yourmechanic.com/article/p0171-obd-ii-trouble-code-system-too-lean-bank-1-by-andrew-quinn) is easiest to find by looking at the secondary firing patterns on the Bank one cylinders. That will confirm if the too lean condition, that has caused the code to set, affects...
P0300 and P0305. Pending: P0304, P0306, P0171, P0174, P2196, P2198
Hi there. The issue that maybe happening is the are fuel injectors that are not firing and there is a vacuum leak on the engine. Possible multiple sensors are not working causing the P2196 (https://www.obd-codes.com/p2196) and P2198 (https://www.obd-codes.com/p2198) codes to...
Periodically vehicle runs rough at idle.
Hi there. Most of the codes that are coming on are for a misfire on cylinder number 3. Check the spark plug and wire on cylinder 3 and see if you are getting a good spark. Then check the fuel...
I have a code P0171 and needs repairs.
Hi there. The code P0171 (https://www.yourmechanic.com/article/p0171-obd-ii-trouble-code-system-too-lean-bank-1-by-andrew-quinn) is caused by the engine getting too hot and not having enough fuel to burn. Check the fuel injectors, fuel pressure, and the fuel pump to see if they are working properly. Since the...
I failed a smog check with the codes PO171 & PO174, saying the system is too lean on the bank 1 & 2. Can you tell me what the problem is?
Hi there. When the two codes P0171 (https://www.yourmechanic.com/article/p0171-obd-ii-trouble-code-system-too-lean-bank-1-by-andrew-quinn) and P0174 (https://www.yourmechanic.com/article/p0174-obd-ii-trouble-code-system-too-lean-bank-2-by-blake-griffin) come up for a lean system on both banks of your engine, then either all of the fuel injectors are not working properly or your fuel pressure has dropped....
Intake air flow leaking. What makes this happen?
Hi there. When having the code P0171 (https://www.yourmechanic.com/article/p0171-obd-ii-trouble-code-system-too-lean-bank-1-by-andrew-quinn), the fuel system is too lean. This could be the fuel pump is not working, the fuel filter is dirty or plugged, or the injectors are plugged or not working properly. Check...
Error code P0171 and P0174
The high positive long term fuel trim suggests a vacuum leak and/or inadequate fuel delivery. But there are other causes that have to be evaluated as well: bad oxygen sensor(s); dirty MAF sensor; stuck open EGR valve; weak fuel pump;...

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