P0171 Code: System Too Lean (Bank 1) Causes & Fixes ByAdmin-January 12, 2025 If you've encountered the diagnostic trouble code (DTC) P0171 - System Too Lean (Bank 1), you're not alone. This common error code often appears when something is amiss with your vehicle's air-to-fuel ra...
Common Trouble Codes Contact Source: actron.com Common Generic OBD II (P0) Codes The Diagnostic Trouble Codes (DTCs) listed below are some of the most commonly reported on OBD II vehicles, those 1996 and newer. Please note that these DTC definitions are provided for reference only. We...
The codes produced from the OBD are known as fault codes or diagnostic trouble codes. OBD codes identify a problem within the broader system, such as the chassis, body, powertrain or network, whereas a DTC code addresses an issue in a specific area. These codes use a specific assortment of...
OBD-IIcodesconsistofanumberofparts.HereisasampleOBD2code:P0171 Hereisabreakdownofwhateachdigitofthecodemeans: FirstCharacter-System Thefirstcharacteridentifiesthesystemrelatedtothetroublecode. •P=Powertrain •B=Body •C=Chassis •U=Undefined ...
What is a standard OBD2 trouble code? Standard OBD2 trouble codes are diagnostic codes used across all car brands and models equipped with an OBD2 system. These codes typically begin with a letter followed by four digits (e.g., P0301). The initial letter indicates the system related to ...
This 2006 BMW M6 V10 came in rough running with a misfire. The misfire was easily located and diagnosed, but trouble arose when the coil at cylinder 10 broke. The top electrical connector portion snapped off when the mechanic was attempting to remove it from the engine. ...
to EN(STi)-138, DTC P0171 — SYSTEM TOO LEAN (BANK 1) —, Diagnostic Procedure with Diagnostic Trouble Code (DTC). P0172 System too Rich (Bank 1) Ref. to EN(STi)-139, DTC P0172 — SYSTEM TOO RICH (BANK 1) —, Diagnostic Procedure with Diagnostic Trouble Code (DTC). P0181 ...
This is the “fine” description of the trouble code and for example, P0420 means there is an issue at Bank 1, while the code P0421 means the issue is at bank 2. While the engine codes are quite logical, it’s very difficult to remember all of these OBD codes. I’ve created a ...
P0234 Error Description Supercharger Overboost Condition The PCM disables (bypasses) the supercharger boost and sets a diagnostic trouble code (DTC) to keep from damaging the powertrain (engine or transmission) during potential harmful operating conditions. Brake torque (brake on and throttle at wide...
This 2006 BMW M6 V10 came in rough running with a misfire. The misfire was easily located and diagnosed, but trouble arose when the coil at cylinder 10 broke. The top electrical connector portion snapped off when the mechanic was attempting to remove it from the engine. ...