OBD Knowledge

Discover everything you need to know about OBD codes in OBDCodex’s OBD Knowledge category, covering OBD2 codes for newer vehicles and OBD1 code lists for older models.

p0172

P0172: System Too Rich (Bank 1)

OBD CodexApr 21, 202411 min read
P0172: System Too Rich (Bank 1) Was the P0172 code activated on your scan tool? Do you wonder whether it is dangerous to keep driving? Read on to have a first evaluation of your situation! Now, you know this code is not that dangerous. If you don’t want to waste your money, let’s dive into […]
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P0121 – Throttle/Pedal position sensor/switch “A” circuit

OBD CodexApr 20, 20246 min read
P0121 – Throttle/Pedal position sensor/switch “A” circuit The P0121 code triggers when the “A” and “B” circuits of your vehicle’s throttle position sensor don’t match, which can be a severe problem, activating your car’s failsafe mode and limiting engine performance. While the throttle position sensor failures are the most common cause of the P0121 trouble […]
p1574 nissan

P1574 Nissan Code: Navigating Transmission Concerns

OBD CodexApr 20, 20248 min read
P1574 Nissan Code: Navigating Transmission Concerns So, you’ve come across the P1574 code in your Nissan, and it’s left you wondering what’s gone awry. No need to panic – In this article, I’m here to help you decode its meaning. I will walk you through the basics of the P1574 code, including why it’s popped […]
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P0014 – “B” Camshaft Position – Timing Over-Advanced or System

OBD CodexApr 20, 20246 min read
P0014 – “B” Camshaft Position – Timing Over-Advanced or System The P0014 OBD2 code tells you the timing of your engine is off. It specifically points you to the B camshaft on bank 1, making this code easier to diagnose than many OBD2 trouble codes. This code can typically be fixed by replacing a valve […]
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P2002 – Diesel particulate filter efficiency below threshold

OBD CodexApr 20, 20246 min read
P2002 – Diesel particulate filter efficiency below threshold The P2002 code applies to diesel engines. They contain an additional filter to remove soot and contaminants from the exhaust. This limits harmful emissions and allows your vehicle to meet state standards.  The activation of P2002 indicates the inefficient filtering of your exhaust. This problem can be […]