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.
Reference Value Parameter Identification (PID)/Measured Signal Table
The following listing reflects PIDS and/or measured values which may reveal a possible concern within each system shown. Match the category number with the related PID/measured signal and go to TYPICAL DIAGNOSTIC REFERENCE VALUE TABLES .
| Category Number | Related PIDS/Measured Signals | ||
|---|---|---|---|
| 5-10-17 | ACP | ||
| 5-10-17 | ACP V | ||
| 1-23 | APP1 | ||
| 1-23 | APP2 | ||
| 1-23 | APP3 | ||
| 23 | BPP (BOO) | ||
| 18-19 | CHT | ||
| 18-19 | CHT V | ||
| 1-2-3-5-6-7-11-12-13-14-15-16-17-20-21 | CMP | ||
| 1-2-3-5-6-7-11-12-13-14-15-16-17-20-21 | CKP | ||
| 1-2-3-5-6-7-11-12-13-14-15-16-17-20-21 | CMP1/2 | ||
| 10 | CPP/PNP | ||
| 3-5-6-7-9-11-15-16-20-21 | DPFEGR | ||
| 4-18-19-21-22 | ECT(1) | ||
| 4-18-19-21-22 | ECT V | ||
| 3-5-6-7-9-11-15-16-20-21 | EGRMC1-4 | ||
| 3-5-6-7-9-11-15-16-20-21 | EGRMDSD | ||
| 3-5-6-7-9-11-15-16-20-21 | EGRVR | ||
| 5-18-19-20-21 | EOT | ||
| 5-18-19-20-21 | EOT V | ||
| 22 | EPC/EPC1/EPC2/EPC3 | ||
| 22 | EPC V | ||
| 3-5-6-11-21 | EVAPCV | ||
| 3-5-6-11-21 | EVMV | ||
| 19 | FCV 3 | ||
| 20 | FLI (H) | ||
| 20 | FLI V | ||
| 1 thru 21 | FP | ||
| 1 thru 21 | FPM or FP M | ||
| 1 thru 21 | FRP | ||
| 1 thru 21 | FRP V | ||
| 1 thru 21 | FRT | ||
| 5 | FTP | ||
| 1 thru 21 | FUELPW1/2 | ||
| 1 thru 21 | FUELSYS (OL/CLSD-LP)(1) | ||
| 22-23 | GEAR | ||
| 19 | HFC (FC3) | ||
| 1 thru 21 | HTR11/12/21/22 | ||
| 1 thru 21 | IAC | ||
| 2-3-5-7-8-10-22 | IAT(1) | ||
| 2-3-5-7-8-10-22 | IAT2(1) | ||
| 5-14-15-16-17-20 | IMRC | ||
| 5-14-15-16-17-20 | IMRCM | ||
| 5-14-15-16-17-20 | IMTV | ||
| 6-11-12-14 thru 18-20-21 | INJ x F | ||
| 4-5-16-18-19-20-21 | KNOCK 1(1) | ||
| 4-5-16-18-19-20-21 | KNOCK 2(1) | ||
| 19 | LFC (FCI) | ||
| 1 thru 21 | LONGFT1/2(1) | ||
| 1 thru 23 | MAF(1) | ||
| 1 thru 23 | MAP | ||
| 1 thru 22 | MISF | ||
| 1 thru 21 | O2S11/12/21/22 | ||
| 22 | OSS | ||
| 10 | PSP | ||
| 10 | PSP_V | ||
| 5 | PTO | ||
| 1 thru 23 | RPM(1) | ||
| 5-14-16-17 | SCBC | ||
| 5-14-16-17 | SCIPC | ||
| 1 thru 21 | SHRTFT1/2/11/12/21/22 | ||
| 15-16-18-19-20-21 | SPRKADV(1) | ||
| 22-23 | SS1(SSA)/SS2(SSB)/SS3(SSC)/SS4(SSD) | ||
| 1-23 | TACM (-) | ||
| 1-23 | TACM (+) | ||
| 6-14-16-20 | TCC | ||
| 22 | TCIL | ||
| 22-23 | TCS | ||
| 22-23 | TFT | ||
| 1-23 | TP | ||
| 1-23 | TP1 | ||
| 1-23 | TP2 | ||
| 22-23 | TR | ||
| 22-23 | TR 1-4 | ||
| 22-23 | TR V | ||
| 22-23 | TR D | ||
| 22-23 | TSS | ||
| 2-4-5-9-10-11-16-17-18-19-20-21 | VCT | ||
| 2-4-5-9-10-11-16-17-18-19-20-21 | VCTDC1/2 | ||
| 1-2-3-5-6-11-12-13-14 | VPWR | ||
| 22-23 | VSS | ||
|
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Some signals can only be measured and require the use of a digital multimeter (DMM).
NO RELATED
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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.