To make certain the air-fuel ratio of the combination burns as effectively as possible.
The powertrain control module (PCM) tweaks the automobile’s fuel trim over brief and lengthy durations.
If the computer cannot properly adjust the air-gas mix, it’s going to log the diagnostic trouble code P0170.
What Does Code P0170 Mean?
Diagnostic Trouble Code (DTC) P0170 stands for “Fuel Trim Malfunction (Bank 1).”
Fuel trim is the adjustment made by the PCM to the engine’s air-fuel mixture. The P0170 code indicates that the fuel trims have reached an abnormally low or abnormally high value for a specified amount of time.
This code is one of a series of codes related to fuel trim. Note that most vehicles won’t set this code but may set other P017x codes, so you may never see this exact code.
The ECM/PCM and the O2 sensor are all about keeping things balanced in the combustion chamber. If the mixture drifts too far out of balance, a code like P0170 is stored. You can learn more about this process here.
Note: Code P0170 is a generic code defined by the Society of Automotive Engineers (SAE). The vehicle’s manufacturer may set a different definition for the code.
Potential Causes of a P0170 Code
Fuel trim malfunctions will have a wide variety of root causes. Vacuum, turbocharge air hoses or unmetered air leaks are a likely perpetrator.
Engine oil that’s saturated with engine oil can cause a P0170 errors code, in addition to oil contamination in both the mass airflow connector or O2 sensor connectors.
Speakme of sensors, defective MAF or O2 sensors can activate the OBD-II system to go back a P0170 code.
Oil may also interfere inside the wiring harness if there’s a leakage in the ignition coils, cam and crank sensors or oil sensors. different possible troubles can consist of a defective gas stress regulator or leaking camshaft adjuster solenoids.
What are the Common Symptoms of the P0170 Code?
The gas trim without delay affects the engine’s overall performance. If the fuel trim runs into a hassle that forces the PCM to log a P0170 code, the subsequent signs may appear:
- An illuminated or blinking Check Engine Light
- The vehicle’s fuel mileage drops because of wasted fuel
- The engine suffers from hesitation when the vehicle accelerates
- The engine misfires and runs rough
- The engine stalls and/or has a rough idle
How to Fix P0170 Code?
Fortunately, there are some steps you could take to rectify a hassle code P0170. The maximum common malfunctions arise with the MAF sensor or the air mass meter, specifically with Mercedes and different ecu vehicle makes.
American cars have a tendency to return other similar codes as an alternative.
Take into account that your OBD-II scanner device can also come across other concurring errors codes. In those instances, you need to preferably troubleshoot and diagnose the foundation reasons of these different errors first.
Feasible locations to begin troubleshooting include watching your car’s MAF sensor readings and changing the sensor if the ones readings aren’t within producer specifications.
Next, take a look at for oil intrusions on the connector, measure gas strain, rule out outside or inner regulator leaks. check out and update any cracked, missing or faulty vacuum hoses.
You ought to additionally look for vacuum leaks on the consumption manifold gaskets or rips in the air supply hose. For turbocharged engines, investigate the ones hoses and update any that have long past terrible or are leaking.
How Much Does it cost to Fix a P0170 Code
The cost to fix a P0170 code, which indicates a fuel trim malfunction on Bank 1, can range from $100 to $500.
Depending on the cause of the issue, including the need to replace parts like faulty sensors, vacuum hoses, or intake manifold gaskets, and the labor costs associated with diagnosis and repair.