About us

Professional Diesel Repair explains OBD2 trouble codes in plain English, for gas cars and diesel pickups. Each code page covers what the code means, what usually causes it, how to test before buying parts, and what the repair tends to cost.

How we write our code pages

Code definitions follow the generic SAE J2012 / OBD2 code descriptions. Diagnosis steps follow standard shop practice: check for other codes, check the simple things, test the circuit, and only then replace parts. Make-specific notes are included only where an issue is well documented, and we tell you to check recalls and service bulletins for your VIN.

About our cost estimates

Repair costs are rough US ranges for an independent shop, built from typical parts prices and standard labor times. They are not quotes and they are not survey data. Your price depends on the vehicle, the shop and what else turns up.

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