Symptoms of code P0171 include:
When you take your car to a mechanic for diagnosis, most will begin with an hour of labor diagnosing your specific issue. This normally costs between $80 and $150, depending on the shop’s labor rate. Then, if you have them do the repairs, many, if not most, businesses will apply this diagnosis cost to any required repairs. A shop will then be able to provide you with an accurate quotation for repairs to fix your P0171 issue.
One or more of the following repairs may be required to resolve the underlying issue for error number P0171. The estimated cost of each repair includes the cost of the relevant parts and the cost of labor required to complete the repair.
Assuming no other fault codes are present, a mechanic can diagnose the P0171 by using a vacuum gauge to examine the engine for suction leaks.
A common mistake is failing to look at any technical service bulletins for your specific car model that may be relevant to this issue.
Although not every issue code is associated with a technical service bulletin, it is always a good idea to double-check. They can save you a tremendous amount of time and work.
The odds are that it will not. If you notice this code, you should get it checked out as soon as possible.
You can usually fix P0171 using the following steps:
If your car’s air filter becomes blocked or extremely unclean, it will hinder or restrict the flow of air. This, in turn, results in a lean running state. A dirty or defective MAF sensor, or a clogged fuel filter, can all be responsible for the P0171 code.