Typical Diagnostic Reference Values
An attempt is made to provide as much information as possible. Some vehicles may not display all input and output signals.
The Typical Diagnostic Reference Value Charts do not display fault parameter identifications (PIDs). These are PIDs which indicate a hard fault with the circuit. They display a value of FAULT or NO FAULT and are PIDs ending with the letter F.
Reference values may vary 20% depending on operating conditions, altitude, and other factors. The RPM values are axle and tire dependent.
Values are taken at an altitude of approximately 189 meters (620 ft) above sea level with the engine at normal operating temperature and accessories off.
For detailed transmission diagnostics, refer to the appropriate Service Articles. Transmission signals may be referred to in either alpha or numeric form. For example, 1=A, 2=B, 3=C.
- Value is not useful under this condition.
- Value depends on fuel tank level. Typical operating range is 15% (empty) to 90% (full).
- Heated oxygen sensors (HO2S) should switch from rich to lean at least once every 3 seconds. HO2S voltage should toggle above and below 0.450 DCV and never be a negative value. Valid HO2S switching occurs only during closed loop fuel control operation.
- Downstream oxygen sensors stay close to a constant voltage when the catalyst monitor is off (positive value only). When the catalyst monitor is on, the HO2S switches from rich to lean above and below 0.450 DCV and should never be a negative value. For downstream oxygen sensors (12, 22) greater activity results when the catalyst monitor is active.
- The normal operation value is from -1.5 to 3.5 degrees.
| PID | Units Measured/PID | Component/PID Only | Measured/PID Values | |||
|---|---|---|---|---|---|---|
| KOEO | Hot Idle | 48KM/H (30 MPH) | 89 KM/H (55 MPH) | |||
| PCM AAT (Deg C) | DEG C (DEG F) | AAT Sensor | 14 (57.2) | 14 (57.2) | 14 (57.2) | 14 (57.2) |
| PCM AAT_V (V) | VOLTS | AAT Sensor | 2.80 | 2.80 | 2.90 | 2.97 |
| PCM APP (%) | % | APP Sensor | 0 | 0 | 7 | 9 |
| PCM APP1 (V) | VOLTS | APP Sensor | 0.80 | 0.80 | 1.04 | 1.11 |
| PCM APP1_[APP_D] (%) | % | APP Sensor | 16 | 16 | 21 | 22 |
| PCM APP2 (V) | VOLTS | APP Sensor | 0.40 | 0.41 | 0.52 | 0.56 |
| PCM APP2_[APP_E] (%) | % | APP Sensor | 8 | 8 | 8 | 8 |
| PCM APP_MAXDIFF (Deg) | DEG | PID | 0 | 0 | 0 | 0 |
| PCM BARO (kPa) | kPa (PSI) | PID | 98 (14.21) | 98 (14.21) | 98 (14.21) | 98 (14.21) |
| PCM BARO_V (V) | VOLTS | PID | 3.84 | 3.84 | 3.84 | 3.84 |
| PCM BATT_V_INF (V) | VOLTS | PID | 12.65 | 14.71 | 14.69 | 14.69 |
| PCM BRKOVRD_POSS | NUMERIC VALUE | PID | 63 | 63 | 63 | 63 |
| PCM BRKOVR_ACTION | NUMERIC VALUE | PID | 0 | 0 | 0 | 0 |
| PCM CAM_SYNC | YES/NO | PID | NO | NO | NO | NO |
| PCM CATTEMP11 (Deg C) | DEG C (DEG F) | CAT11 Sensor | 418 (784.4) | 421 (789.8) | 535 (995) | 804 (1, 486.4) |
| PCM CATTEMP21 (Deg C) | DEG C (DEG F) | CAT21 Sensor | 418 (784.4) | 421 (789.8) | 536 (996.8) | 803 (1, 477.4) |
| PCM CHT (Deg C) | DEG C (DEG F) | CHT Sensor | 101 (213.8) | 100 (212) | 99 (210.2) | 100 (212) |
| PCM CHT2 (Deg C) | DEG C (DEG F) | CHT2 Sensor | 105 (221) | 104 (219.2) | 106 (222.8) | 114 (237.2) |
| PCM CHT2_V (V) | VOLTS | CHT2 Sensor | 3.24 | 3.25 | 3.19 | 2.92 |
| PCM CLRDIST (km) | KM (MILES) | PID | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| PCM DECHOKE | YES/NO | PID | YES | NO | NO | NO |
| PCM DIST_AEIS (km) | KM (MILES) | PID | 148 (91.96) | 148 (91.96) | 148 (91.96) | 148.5 (92.27) |
| PCM DIST_BRKOVRD (km) | KM (MILES) | PID | 0.5 (0.31) | 0.5 (0.31) | 0.5 (0.31) | 1 (0.62) |
| PCM DPFE_PRES (kPa) | kPa (PSI) | Differential Pressure Feedback EGR Sensor | -0.01 (-0.00) | -0.02 (-0.00) | 0.01 (0.00) | 0.94 (0.14) |
| PCM DPFE_V (V) | VOLTS | Differential Pressure Feedback EGR Sensor | 2.00 | 2.00 | 2.01 | 2.15 |
| PCM DTCCNT | NUMERIC VALUE | PID | 0 | 0 | 0 | 0 |
| PCM DTCCNT_OBD | NUMERIC VALUE | PID | 0 | 0 | 0 | 0 |
| PCM EBP (kPa) | kPa (PSI) | EBP Sensor | 99.69 (14.46) | 96.41 (13.98) | 108.44 (15.73) | 104 (15.08) |
| PCM EBP_V (V) | VOLTS | EBP Sensor | 0.98 | 0.93 | 1.11 | 1.12 |
| PCM ECT (Deg C) | DEG C (DEG F) | ECT Sensor | 101 (213.8) | 99 (210.2) | 98 (208.4) | 100 (212) |
| PCM ECT1_V (V) | VOLTS | ECT Sensor | 0.43 | 0.43 | 0.45 | 0.43 |
| PCM EGRT_B (Deg C) | DEG C (DEG F) | EGRT12 Sensor | 64 (147.2) | 64 (147.2) | 64 (147.2) | 76 (168.8) |
| PCM EGRT_B_V (V) | VOLTS | EGRT12 Sensor | 1.18 | 1.18 | 3.84 | 0.85 |
| PCM EGRVP (V) | VOLTS | EGR Valve | 0.57 | 0.56 | 0.56 | 0.94 |
| PCM EGRVPDES (%) | % | PID | 0 | 0 | 0 | 9 |
| PCM EGR_A_ACT (%) | % | EGR Valve | 1 | 0 | 0 | 9 |
| PCM EGR_A_CMD (%) | % | PID | 1 | 0 | 0 | 9 |
| PCM EQ_RAT11 | RATIO | PID | 0.00 | 1.02 | 1.02 | 0.93 |
| PCM EQ_RAT21 | RATIO | PID | 0.00 | 1.01 | 1.01 | 0.91 |
| PCM ETC_ACT (Deg) | DEG | PID | 7.53 | 2.41 | 7.42 | 8.92 |
| PCM ETC_TRIM (Deg) | DEG | PID | 0.33 (E) | 0.33 (E) | 0.33 (E) | 0.33 (E) |
| PCM ETC_[TAC_PCT] (%) | % | PID | 9 | 3 | 9 | 11 |
| PCM EVAP020C | YES/NO | PID | NO | NO | NO | NO |
| PCM EVAPCP (%) | % | EVAPCP Valve | 0 | 36 | 28 | 46 |
| PCM EVAPCV (%) | % | CANV Valve | 0 | 0 | 0 | 0 |
| PCM EVAPPCT (%) | % | PID | 0 | 36 | 27 | 45 |
| PCM EVAPSOAK | YES/NO | PID | FALSE | TRUE | FALSE | FALSE |
| PCM EVAPSTA | STATUS | PID | NOT RUNNING | NOT RUNNING | NOT RUNNING | NOT RUNNING |
| PCM EVBV (% Duty Cycle) | % | EVAP Vapor Blocking Valve | 0 | 0 | 0 | 0 |
| PCM FANELC_CMD (% Duty Cycle) | % | PID | 8 | 9 | 0 | 11 |
| PCM FAN_DSD (%) | % | PID | 0 | 0 | 0 | 0 |
| PCM FLI (%) | % | Fuel Level Sensor | 26 (B) | 26 (B) | 22 (B) | 35 (B) |
| PCM FLP (kPa) | kPa (PSI) | Fuel Pressure Sensor | 629 (91.23) | 615 (89.19) | 676 (98.05) | 663 (96.16) |
| PCM FLP_DSD (kPa) | kPa (PSI) | Fuel Pressure Sensor | 603 (87.46) | 603 (87.46) | 603 (87.46) | 603 (87.46) |
| PCM FLP_V (V) | VOLTS | Fuel Pressure Sensor | 2.62 | 2.56 | 2.81 | 2.76 |
| PCM FP (%) | % | Fuel Pump Control Module | 75 | 22 | 31 | 25 |
| PCM FPM (%) | % | PID | 40 | 40 | 40 | 40 |
| PCM FRP (kPa) | kPa (PSI) | FRP Sensor | 8, 310 (1, 205.26) | 6, 820 (989.16) | 1, 1270 (1, 634.58) | 10, 750 (1, 559.16) |
| PCM FRP_DSD (kPa) | kPa (PSI) | PID | 520 (75.42) | 2, 060 (298.78) | 2, 060 (298.78) | 2, 060 (298.78) |
| PCM FRP_V (V) | VOLTS | FRP Sensor | 1.36 | 1.16 | 1.76 | 1.70 |
| PCM FRT_A_RAW (Deg C) | DEG C (DEG F) | FRPT Sensor | 65 (149) | 65 (149) | 66 (150.8) | 66 (150.8) |
| PCM FRT_V (V) | VOLTS | FRT Sensor | 1.04 | 1.04 | 1.02 | 1.04 |
| PCM FTP_V (V) | VOLTS | FTP Sensor | 2.62 | 2.62 | 2.49 | 2.44 |
| PCM FUELSYS_A_PCT_B1 (%) | % | PID | 0 | 0 | 0 | 37 |
| PCM FUELSYS_A_PCT_B2 (%) | % | PID | 0 | 0 | 0 | 37 |
| PCM FUELSYS_B_PCT_B1 (%) | % | PID | 0 | 100 | 100 | 63 |
| PCM FUELSYS_B_PCT_B2 (%) | % | PID | 0 | 100 | 100 | 63 |
| PCM FUELSYS_CL | YES/NO | PID | NO | YES | YES | YES |
| PCM FUELSYS_OL | YES/NO | PID | NO | NO | NO | NO |
| PCM F_VCV_CMD (%) | % | Fuel Injection Pump | 0 | 0 | 0 | 0 |
| PCM HTR11 | ON/OFF | HO2S11 Sensor | OFF | ON | ON | ON |
| PCM HTR12 | ON/OFF | HO2S12 Sensor | OFF | ON | ON | ON |
| PCM HTR21 | ON/OFF | HO2S21 Sensor | OFF | ON | ON | ON |
| PCM HTR22 | ON/OFF | HO2S22 Sensor | OFF | ON | ON | ON |
| PCM HTRCM11 (Amp) | mA | HO2S11 Sensor | 0.00 | 0.00 | 0.00 | 0.00 |
| PCM HTRCM12 (Amp) | mA | HO2S12 Sensor | 0.00 | 0.00 | 0.00 | 0.00 |
| PCM HTRCM21 (Amp) | mA | HO2S21 Sensor | 0.00 | 0.00 | 0.00 | 0.00 |
| PCM HTRCM22 (Amp) | mA | HO2S22 Sensor | 0.00 | 0.00 | 0.00 | 0.00 |
| PCM IAT (Deg C) | DEG C (DEG F) | IAT Sensor | 59 (138.2) | 59 (138.2) | 55 (131) | 46 (114.8) |
| PCM IAT11 (Deg C) | DEG C (DEG F) | IAT Sensor | 59 (138.2) | 59 (138.2) | 55 (131) | 46 (114.8) |
| PCM IAT12 (Deg C) | DEG C (DEG F) | IAT2 Sensor | 57 (134.6) | 56 (138.2) | 46 (114.8) | 31 (87.8) |
| PCM IAT1_V (V) | VOLTS | IAT Sensor | 1.09 | 1.11 | 1.21 | 1.52 |
| PCM IAT2 (Deg C) | DEG C (DEG F) | IAT2 Sensor | 57 (134.6) | 55 (132.8) | 46 (114.8) | 31 (87.8) |
| PCM IAT2_V (V) | VOLTS | IAT2 Sensor | 1.16 | 1.21 | 1.51 | 2.13 |
| PCM INJPWR_M (V) | VOLTS | PID | 12.44 | 14.49 | 14.40 | 14.38 |
| PCM KNK_CNTR_CYL1 | COUNT | PID | 0 | 0 | 0 | 0 |
| PCM KNK_CNTR_CYL2 | COUNT | PID | 0 | 0 | 0 | 0 |
| PCM KNK_CNTR_CYL3 | COUNT | PID | 0 | 0 | 0 | 0 |
| PCM KNK_CNTR_CYL4 | COUNT | PID | 0 | 0 | 0 | 0 |
| PCM KNK_CNTR_CYL5 | COUNT | PID | 0 | 0 | 0 | 0 |
| PCM KNK_CNTR_CYL6 | COUNT | PID | 0 | 0 | 0 | 0 |
| PCM KNOCK_1 | COUNT | KS11 Sensor | 999 | 42.00 | 112.0 | 162 |
| PCM KNOCK_2 | COUNT | KS12 Sensor | 999 | 35.00 | 71.0 | 120 |
| PCM LOAD (%) | % | PID | 0 (A) | 34 | 58 | 35 |
| PCM LOAD_ABSL (%) | % | PID | 0 (A) | 20 | 49 | 51 |
| PCM LONGFT1 (%) | % | PID | (A) | -20 TO +20 | -20 TO +20 | -20 TO +20 |
| PCM LONGFT2 (%) | % | PID | (A) | -20 TO +20 | -20 TO +20 | -20 TO +20 |
| PCM MAP (kPa) | kPa (PSI) | MAP Sensor | 97 (14.07) | 42 (6.09) | 97 (14.07) | 78 (11.31) |
| PCM MAP_V (V) | VOLTS | MAP Sensor | 1.49 | 0.64 | 1.47 | 1.23 |
| PCM MIL_DIS (km) | KM (MILES) | PID | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) |
| PCM MIL_OBD | ON/OFF | PID | OFF | OFF | OFF | OFF |
| PCM MISFIRE | TRUE/FALSE | PID | FALSE | FALSE | TRUE | FALSE |
| PCM MP_LRN | TRUE/FALSE | PID | TRUE | TRUE | TRUE | TRUE |
| PCM NUM_MISFIRE | COUNT | PID | 0 | 0 | 0 | 0 |
| PCM O2S11_CUR (mA) | mA/uA | HO2S11 Sensor | (A) | switching (C) | switching (C) | switching (C) |
| PCM O2S11_HTR (%) | % | HO2S11 Sensor | 22 | 58 | 27 | 24.13 |
| PCM O2S11_IMPED (V) | VOLTS | HO2S11 Sensor | 5.00 | 0.98 | 1.05 | 1.05 |
| PCM O2S11_READY | TRUE/FALSE | HO2S11 Sensor | FALSE | TRUE | TRUE | TRUE |
| PCM O2S11_TR (Ohm) | Kohm | HO2S11 Sensor | 0.00 | 131.6 | 131.6 | 131.6 |
| PCM O2S12 (V) | VOLTS | HO2S12 Sensor | (A) | switching (D) | switching (D) | switching (D) |
| PCM O2S21_CUR (mA) | mA/uA | HO2S21 Sensor | (A) | switching (C) | switching (C) | switching (C) |
| PCM O2S21_HTR (%) | % | HO2S21 Sensor | 22 | 70 | 25 | 25 |
| PCM O2S21_IMPED (V) | VOLTS | HO2S21 Sensor | 5.00 | 1.03 | 1.06 | 1.05 |
| PCM O2S21_READY | TRUE/FALSE | HO2S21 Sensor | FALSE | TRUE | TRUE | TRUE |
| PCM O2S21_TR (Ohm) | Kohm | HO2S21 Sensor | 0.00 | 101.8 | 101.8 | 101.8 |
| PCM O2S22 (V) | VOLTS | HO2S22 Sensor | (A) | switching (D) | switching (D) | switching (D) |
| PCM O2_DS_DISBL | TRUE/FALSE | PID | TRUE | FALSE | FALSE | FALSE |
| PCM PATSENABL | ENABLED / DISABLED | PID | ENABLED | ENABLED | ENABLED | ENABLED |
| PCM RO2FT1 (%) | % | PID | 0.00 | -0.01 | 0.02 | 0.00 |
| PCM RO2FT2 (%) | % | PID | 0.00 | 0.01 | 0.02 | 0.00 |
| PCM RPM (Rpm) | RPM | CKP Sensor | 0 | 827 | 1, 765 | 1, 772 |
| PCM RPM_DSD (RPM) | RPM | PID | 1, 144 | 820 | 580 | 580 |
| PCM SHRTFT1 (%) | % | PID | (A) | -10 TO +10 | -10 TO +10 | -10 TO +10 |
| PCM SHRTFT2 (%) | % | PID | (A) | -10 TO +10 | -10 TO +10 | -10 TO +10 |
| PCM SPARKADV (Deg) | DEG | PID | 1.50 | 7.50 | 17.0 | 5.0 |
| PCM SYNC | YES/NO | PID | NO | YES | YES | YES |
| PCM TCBP (kPa) | kPa (PSI) | TCBP Sensor | 98.2 (14.24) | 98.4 (14.27) | 112.1 (16.26) | 126.5 (18.35) |
| PCM TCBP_V (V) | VOLTS | TCBP Sensor | 1.41 | 1.41 | 1.59 | 1.78 |
| PCM TP1_LRN_TRIM (Deg) | DEG | ETBTPS | 10.25 | 10.25 | 10.25 | 10.25 |
| PCM TP1_PER (%) | % | ETBTPS | 18 | 13 | 23 | 31 |
| PCM TP2_LRN_TRIM (Deg) | DEG | ETBTPS | 0 | 0 | 0 | 0 |
| PCM TURBO_BP1_STAT | FAULT/NO FAULT | TCBY Valve | NO FAULT | NO FAULT | NO FAULT | NO FAULT |
| PCM TURBO_BPASS (%) | % | TCBY Valve | 0 | 0 | 0 | 0 |
| PCM TURBO_WGATE (%) | % | Turbocharger Wastegate Control | 0 | 0 | 0 | 0 |
| PCM VCTSYS | ENABLED / DISABLED | PID | DISABLED | ENABLED | ENABLED | ENABLED |
| PCM VCT_EXH_ACT1 (Deg) | DEG | PID | 0.00 | 0.06 | 14.00 | 9.81 |
| PCM VCT_EXH_ACT2 (Deg) | DEG | PID | 0.00 | -0.06 | 14.50 | 9.81 |
| PCM VCT_EXH_DC1 (%) | % | VCT12 Solenoid | 0.00 | 0.00 | 43.00 | 40.00 |
| PCM VCT_EXH_DC2 (%) | % | VCT22 Solenoid | 0.00 | 0.00 | 42.00 | 41.00 |
| PCM VCT_EXH_DIF1 (Deg) | DEG | PID | 0.00 | -0.06 | 1.25 | 0.13 |
| PCM VCT_EXH_DIF2 (Deg) | DEG | PID | 0.00 | 0.06 | 1.19 | 0.13 |
| PCM VCT_INT_ACT1 (Deg) | DEG | PID | 0.00 | -0.38 | -20.19 | -29.00 |
| PCM VCT_INT_ACT2 (Deg) | DEG | PID | 0.00 | -0.06 | -20.19 | -29.63 |
| PCM VCT_INT_DC1 (%) | % | VCT11 Solenoid | 0.00 | 0.00 | 38.00 | 40.00 |
| PCM VCT_INT_DC2 (%) | % | VCT21 Solenoid | 0.00 | 0.00 | 38.00 | 40.00 |
| PCM VCT_INT_DIF1 (Deg) | DEG | PID | 0.00 | 0.25 | 0.44 | -0.06 |
| PCM VCT_INT_DIF2 (Deg) | DEG | PID | 0.00 | 0.06 | 1.06 | 0.06 |
| PCM VPWR (V) | VOLTS | PID | VBAT | VBAT | VBAT | VBAT |
| PCM VREF (V) | VOLTS | PID | 9.55 | 9.55 | 9.55 | 9.55 |
| PCM VSS (Kph) | km/h (MPH) | PID | 0 (0) | 0 (0) | 48 km/h (30 MPH) | 89 km/h (55 MPH) |
| PCM WGATE_A_POS_PCT (% Open) | % | Turbocharger Wastegate Motor 1 | 33.06 | 0.36 | 64.93 | 9.93 |
| PCM WGATE_A_V (V) | VOLTS | Wastegate Position Sensor 1 | 2.02 | 1.20 | 3.15 | 1.45 |
| PCM WGATE_B_POS_PCT (% Open) | % | Turbocharger Wastegate Motor 2 | 33.11 | 0.31 | 57.12 | 10.14 |
| PCM WGATE_B_V (V) | VOLTS | Wastegate Position Sensor 2 | 2.04 | 1.22 | 2.69 | 1.49 |