Diagnostic Trouble Code Index - P Codes (4.0L)
DIAGNOSTIC TROUBLE CODE INDEX
| DTC | Possible Source | Action |
|---|---|---|
| P0102 | Mass air flow (MAF) circuit low input | GO to PINPOINT TEST A . |
| P0103 | Mass air flow (MAF) circuit high input | GO to PINPOINT TEST A . |
| P1100 | Mass air flow (MAF) sensor intermittent | GO to PINPOINT TEST A . |
| P1101 | Mass air flow (MAF) sensor out of test range | GO to PINPOINT TEST A . |
| P0112 | Intake air temperature (IAT) circuit low input | GO to PINPOINT TEST B . |
| P0113 | Intake air temperature (IAT) circuit high input | GO to PINPOINT TEST B . |
| P1112 | Intake air temperature (IAT) sensor intermittent | GO to PINPOINT TEST B . |
| P0117 | Engine coolant temperature circuit low input | GO to PINPOINT TEST C . |
| P0118 | Engine coolant temperature circuit high input | GO to PINPOINT TEST C . |
| P0125 | Insufficient coolant temperature for closed loop fuel control | CHECK the operation of the cooling system. |
| P1116 | Engine coolant temperature sensor out of self test range | GO to PINPOINT TEST C . |
| P1117 | Engine coolant temperature sensor intermittent | GO to PINPOINT TEST C . |
| P1121 | Throttle position (TP) sensor inconsistant with MAF sensor | GO to PINPOINT TEST D . |
| P1124 | Throttle position (TP) sensor out of self test range | GO to PINPOINT TEST D . |
| P0122 | Throttle position (TP) sensor A circuit low input | GO to PINPOINT TEST D . |
| P0123 | Throttle position (TP) sensor A circuit high input | GO to PINPOINT TEST D . |
| P0124 | Throttle position (TP) sensor A intermittent | GO to PINPOINT TEST D . |
| P0222 | Throttle position sensor B circuit low input | GO to PINPOINT TEST D . |
| P0223 | Throttle position sensor B circuit high input | GO to PINPOINT TEST D . |
| P0224 | Throttle position sensor B intermittent | GO to PINPOINT TEST D . |
| P0227 | Throttle position sensor C circuit low input | GO to PINPOINT TEST D . |
| P0228 | Throttle position sensor C circuit high input | GO to PINPOINT TEST D . |
| P0229 | Throttle position sensor C intermittent | GO to PINPOINT TEST D . |
| P1127 | Exhaust not warm enough, downstream oxygen sensors not tested | CLEAR DTC. Run the engine to normal operating temperature. |
| P1128 | Upstream oxygen sensors swapped from bank to bank | Raise and support the vehicle. Correctly install the oxygen sensors. |
| P1129 | Downstream oxygen sensors swapped from bank to bank | Raise and support the vehicle. Correctly install the downstream oxygen sensors. |
| P0131 | Heated oxygen sensor circuit out of range low voltage (Bank 1 upstream) | GO to PINPOINT TEST E . |
| P0132 | Heated oxygen sensor circuit high voltage (Bank 1 upstream) | GO to PINPOINT TEST E . |
| P0133 | Heated oxygen sensor circuit slow response (Bank 1 upstream) | GO to PINPOINT TEST E . |
| P0135 | Heated oxygen sensor heater circuit malfunction (Bank 1 upstream) | GO to PINPOINT TEST E . |
| P1130 | Lack of HO2S-11 switch, adaptive fuel at limit (Bank 1 upstream) | GO to PINPOINT TEST E . |
| P1131 | Lack of HO2S-11 switch, sensor indicates lean (Bank 1 upstream) | GO to PINPOINT TEST E . |
| P1132 | Lack of HO2S-11 switch, sensor indicates rich (Bank 1 upstream) | GO to PINPOINT TEST E . |
| P0136 | Heated oxygen sensor circuit malfunction (Bank 1 downstream) | GO to PINPOINT TEST F . |
| P0138 | Heated oxygen sensor circuit high voltage (Bank 1 downstream) | GO to PINPOINT TEST F . |
| P0141 | Heated oxygen sensor heater circuit malfunction (Bank 1 downstream) | GO to PINPOINT TEST F . |
| P1137 | Lack of HO2S-12 switch, sensor indicates lean (Bank 1 downstream) | GO to PINPOINT TEST F . |
| P0420 | Catalyst system efficiency below threshold (bank 1) | GO to PINPOINT TEST F . |
| P1138 | Lack of HO2S-12 switch, sensor indicates rich (Bank 1 downstream) | GO to PINPOINT TEST F . |
| P0151 | Heated oxygen sensor circuit out of range low voltage (Bank 2 upstream) | GO to PINPOINT TEST G . |
| P0152 | Heated oxygen sensor circuit out of range low voltage (Bank 2 upstream) | GO to PINPOINT TEST G . |
| P0153 | Heated oxygen sensor circuit slow response (Bank 2 upstream) | GO to PINPOINT TEST G . |
| P1150 | Lack of HO2S-21 switch, adaptive fuel at limit (Bank 2 upstream) | GO to PINPOINT TEST G . |
| P1151 | Lack of HO2S-21 switch, sensor indicates lean (Bank 2 upstream) | GO to PINPOINT TEST G . |
| P1152 | Lack of HO2S-21 switch, sensor indicates rich (Bank 2 upstream) | GO to PINPOINT TEST G . |
| P0155 | Heated oxygen sensor heater circuit malfunction (Bank 2 upstream) | GO to PINPOINT TEST G . |
| P0156 | Heated oxygen sensor circuit malfunction (Bank 2 downstream) | GO to PINPOINT TEST H . |
| P0158 | Heated oxygen sensor circuit high voltage (Bank 2 downstream) | GO to PINPOINT TEST H . |
| P1157 | Lack of HO2S-22 switch, sensor indicates lean (Bank 2 downstream) | GO to PINPOINT TEST H . |
| P1158 | Lack of HO2S-22 switch, sensor indicates rich (Bank 2 downstream) | GO to PINPOINT TEST H . |
| P0161 | Heated oxygen sensor heater circuit malfunction (Bank 2 downstream) | GO to PINPOINT TEST H . |
| P0430 | Catalyst system efficiency below threshold (bank 2) | GO to PINPOINT TEST H . |
| P0180 | Fuel temperature sensor A circuit malfunction | GO to PINPOINT TEST I . |
| P1183 | Engine oil temperature sensor circuit malfunction | GO to PINPOINT TEST J . |
| P1184 | Engine oil temperature sensor out of self test range | GO to PINPOINT TEST J . |
| P0325 | Knock sensor 1 circuit malfunction | GO to PINPOINT TEST K . |
| P0330 | Knock sensor 2 circuit malfunction | GO to PINPOINT TEST L . |
| P0340 | Camshaft position sensor A circuit malfunction | GO to PINPOINT TEST M . |
| P0341 | Camshaft position sensor B circuit malfunction | GO to PINPOINT TEST N . |
| P1380 | Variable cam timing solonoid A malfunction | GO to PINPOINT TEST O . |
| P1381 | Variable cam timing over-advanced, bank A | GO to PINPOINT TEST O . |
| P1383 | Variable cam timing over-retarded, bank A | GO to PINPOINT TEST O . |
| P1385 | Variable cam timing solonoid B malfunction | GO to PINPOINT TEST P . |
| P1386 | Variable cam timing over-advanced, bank B | GO to PINPOINT TEST P . |
| P1388 | Variable cam timing over-retarded, bank B | GO to PINPOINT TEST P . |
| P0602 | Powertrain control module programming error | Reconfigure the powertrain control module. |
| P0603 | Powertrain control module KAM test error | INSTALL a new powertrain control module (PCM). |
| P0605 | Powertrain control module ROM test error | INSTALL a new powertrain control module (PCM). |
| P1633 | KAM voltage too low | GO to PINPOINT TEST Q . |