![]() In doing so, it seeks to further integrate each nation’s development strategy with its own. Indeed, China has been fortifying its strategic ties and expanding its cooperation by heavily investing in local Belt and Road Initiative (BRI) projects, as well as the infrastructure and technologies of the future. First, while it is widely assumed that Beijing’s interests in the region are limited to energy security and economic ties, this report will show how cooperation has expanded in recent years across the board. This report addresses two widely held beliefs about the nature of China’s engagement in the Middle East and North Africa (MENA) that ought to be revisited in light of notable developments. As listed above there are several systems involved that could potentially be malfunctioning, so guessing could become costly.įor more information, questions, or help diagnosing your vehicle, contact the GoTech technical support team via phone or chat below.FebruFull throttle in neutral: China’s new security architecture for the Middle East Proper and accurate diagnosis are required to pin-point the cause of P0171 and P0174 diagnostic trouble codes. So be sure to check service information for the correct procedure.ĭue to the number of components that are involved in the operation of your vehicles engine management system. Be careful, as many modern vehicles use a gasoline direct injection (GDI) system and run at extremely high pressures. If your vehicle does not have this option, a fuel pressure gauge will have to be installed to read fuel pressure manually. Some vehicles are equipped with a fuel pressure sensor and fuel pressure can be read using a scan tool. Every vehicle operates differently so you should consult your vehicles service information to obtain the correct procedure in checking these signals.Ĭheck fuel pressure: Obtain a fuel pressure reading and compare to the factory listed specification. If a scan tool is not available a multimeter can be used to read signal voltage. Tip : Exhaust leaks behind the rear O2 sensor will not affect air/fuel mixtureĬheck oxygen sensors and/or air fuel ratio sensors: Using a scan tool, monitor the signal voltage of the O2 sensors and/or A/F sensors and make sure they are operating correctly. ![]() For hard-to-find leaks, spray soapy water on suspected locations and look for bubbles to pinpoint leak. These are tell-tale signs of a leaking exhaust. Look for any cracks or damage to exhaust pipes and any black soot marks. Visually inspect and listen for exhaust system leaks. Inspect Exhaust: Leaking exhaust can affect O2 sensor readings. If a scan tool is available, check MAF sensor signal reading and compare to vehicles listed specification. If dirty, clean sensor using a quality MAF cleaner. A smoke machine may be needed to locate hard to find leaks.Ĭheck Mass Air Flow sensor: Remove the MAF sensor and look for signs of contamination, debris that makes it past the air filter or oil from an aftermarket air filter can stick on MAF sensor and cause inaccurate signals. Check that air intake tubing is installed properly and is not torn or damaged. Inspect for vacuum leaks: Visually inspect and listen for any obvious engine vacuum leaks, look for any broken or cracked vacuum lines, pay close attention to brake booster and PCV hoses. Tip : See if any other DTCs are stored, additional trouble codes may help determine root cause of P0171, P0174 DTCs MAF sensor cleaner ( CRC MAF Sensor Cleaner).Scan tool ( Autel scan tools that show data PIDs).How to diagnose P0171 and P0174 DTCs? Recommended tools This can be caused by several things such as a faulty fuel pump, dirty fuel filter or clogged fuel injectors. Low fuel pressure, incorrect fuel flow/delivery: Low fuel pressure or poor fuel flow causes less fuel to be delivered to the engine than commanded by the ECM, resulting in a lean running condition. Therefore, a faulty O2 sensor or A/F sensor can provide incorrect feedback to the ECM and create a false lean condition. ![]() If the sensors read excess oxygen in the exhaust, it tells the ECM the engine is running lean. Malfunctioning oxygen (O2) sensor or air fuel ratio (A/F) sensor: The ECM uses O2 sensors and A/F sensors to test the exhaust gas, this provides feedback on the air/fuel mixture delivered to the engine. ![]() Tip : A faulty or skewed coolant temperature sensor and/or air temperature sensor can cause certain systems to mis-calculate air/fuel mixtures, resulting in P0171, P0174 DTCs. ![]()
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