Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Generic OBD PID List
| Freeze Frame | Acronym | Description | Measurement Units | ||||
|---|---|---|---|---|---|---|---|
| AIR | Secondary Air Status | On/Off | |||||
| CCNT | Continuous DTC Counter | Unitless | |||||
| X | ECT | Engine Coolant Temperature | Degrees | ||||
| X | FUEL SYS1 | Fuel System Feedback Control Status-Bank 1 | OL/CL/OL DRIVE (1) / OL FAULT/ CL FAULT | ||||
| X | FUEL SYS2 | Fuel System Feedback Control Status-Bank 2 | OL/CL/OL DRIVE (1) /OL FAULT/ CL FAULT | ||||
| IAT | Intake Air Temperature | Degrees | |||||
| X | LOAD (2) | Calculated Engine Load | % | ||||
| X | LONGFT1 | Current Bank 1 Fuel Trim Adjustment (kamref1) From Stoichiometry Which Is Considered Long Term. | % | ||||
| X | LONGFT2 | Current Bank 2 Fuel Trim Adjustment (kamref2) From Stoichiometry Which Is Considered Long Term. | % | ||||
| MAF | Mass Air Flow Rate | gm/s-lb/min | |||||
| O2S11 | Bank 1 Upstream Oxygen Sensor (11) | Volts | |||||
| O2S12 | Bank 1 Downstream Oxygen Sensor (12) | Volts | |||||
| O2S13 | Bank 1 Downstream Oxygen Sensor (13) | Volts | |||||
| O2S21 | Bank 2 Upstream Oxygen Sensor (21) | Volts | |||||
| O2S22 | Bank 2 Downstream Oxygen Sensor (22) | Volts | |||||
| OBDSUP | On-Board Diagnostic System | OBD II | |||||
| OBD I | |||||||
| OBD Combination of or None | |||||||
| PTO | Power Take-Off Status | On/Off | |||||
| X | RPM | Revolutions per Minute | RPM | ||||
| X | SHRTFT1 | Current Bank Fuel Trim Adjustment (lambse1) From Stoichiometry Which Is Considered Short Term. | % | ||||
| X | SHRTFT2 | Current Bank 2 Fuel Trim Adjustment (lambse1) From Stoichiometry Which Is Considered Short Term. | % | ||||
| SPARKADV | Spark Advance | Degrees | |||||
| X | TP VSS |
Throttle Position Vehicle Speed Sensor |
% km/h-mph |
||||
An X in the Freeze Frame column denotes both a mode 1 and mode 2 PID (real time and freeze frame).
CL = Closed loop using HO2S(s) as feedback for fuel control OL DRIVE = Open loop due to driving conditions (heavy acceleration). OL FAULT = Open loop due to fault with all upstream HO2S sensors. CL FAULT = Closed loop fuel control, but fault with one upstream HO2S sensor on dual bank vehicles. |
|||||||
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.