| Fault Code |
Refer to Footnote |
Circuit Index |
Condition Description |
Probable Causes |
| P0107 |
a b |
BARO |
Barometric pressure sensor circuit low input |
PCM's internal barometric sensor |
| P0108 |
a b |
BARO |
Barometric pressure sensor circuit high input |
PCM's internal barometric sensor |
| P0112 |
b |
IAT |
Intake air temp. sensor circuit low input |
Grounded circuit, biased sensor, PCM |
| P0113 |
b |
IAT |
Intake air temp. sensor circuit high input |
Open circuit, biased sensor, PCM, short to 5v |
| P0122 |
a b |
AP |
Accelerator pedal sensor circuit low input |
Grounded circuit, biased sensor, PCM |
| P0123 |
a b |
AP |
Accelerator pedal sensor circuit high input |
Open circuit, biased sensor, PCM, short to 5v |
| P0197 |
a b |
EOT |
Engine oil temp. sensor circuit low input |
Grounded circuit, biased sensor, PCM |
| P0198 |
a b |
EOT |
Engine oil temp. sensor circuit high input |
Open circuit, biased sensor, PCM short to 5v |
| P0220 |
— |
IVS |
Throttle switch B circuit malfunction |
Short/open circuit, switch failure, operator, PCM |
| P0221 |
a b |
AP/IVS |
Throttle switch B circuit performance |
Failed pedal assembly |
| P0230 |
— |
FP |
Fuel pump relay driver failure |
Open FP relay, blown fuse, open/grounded circuit |
| P0231 |
b |
FP |
Fuel pump circuit failure |
Fuse, relay, inertia switch, fuel pump, open/short circuit |
| P0232 |
— |
FP |
Fuel pump circuit failure |
Relay failure, short circuit, pump failure |
| P0236 |
b |
MAP |
Turbo boost sensor A circuit performance |
Restricted inlet/exhaust/supply hose, missing hose |
| P0237 |
a b |
MAP |
Turbo boost sensor A circuit low input |
Circuit open, short to ground, MAP sensor |
| P0238 |
a b |
MAP |
Turbo boost sensor A circuit low high |
Circuit short to power, MAP sensor |
| P0261 |
a b |
INJ |
Injector circuit low — Cylinder 1 |
Harness short to ground |
| P0262 |
— |
INJ |
Injector circuit high — Cylinder 1 |
Miswired connector or harness |
| P0263 |
— |
PCED |
Cylinder 1 contribution/balance fault |
Power cylinder, valve train or injector problem, circuit |
| P0264 |
a b |
INJ |
Injector circuit low — Cylinder 2 |
Harness short to ground |
| P0265 |
— |
INJ |
Injector circuit high — Cylinder 2 |
Miswired connector or harness |
| P0266 |
— |
PCED |
Cylinder 2 contribution/balance fault |
Power cylinder, valve train or injector problem, circuit |
| P0267 |
a b |
INJ |
Injector circuit low — Cylinder 3 |
Harness short to ground |
| P0268 |
— |
INJ |
Injector circuit high — Cylinder 3 |
Miswired connector or harness |
| P0269 |
— |
PCED |
Cylinder 3 contribution/balance fault |
Power cylinder, valve train or injector problem, circuit |
| P0270 |
a b |
INJ |
Injector circuit low — Cylinder 4 |
Harness short to ground |
| P0271 |
— |
INJ |
Injector circuit high — Cylinder 4 |
Miswired connector or harness |
| P0272 |
— |
PCED |
Cylinder 4 contribution/balance fault |
Power cylinder, valve train or injector problem, circuit |
| P0273 |
a b |
INJ |
Injector circuit low — Cylinder 5 |
Harness short to ground |
| P0274 |
— |
INJ |
Injector circuit high — Cylinder 5 |
Miswired connector or harness |
| P0275 |
— |
PCED |
Cylinder 5 contribution/balance fault |
Power cylinder, valve train or injector problem, circuit |
| P0276 |
a b |
INJ |
Injector circuit low — Cylinder 6 |
Harness short to ground |
| P0277 |
— |
INJ |
Injector circuit high — Cylinder 6 |
Miswired connector or harness |
| P0278 |
— |
PCED |
Cylinder 6 contribution/balance fault |
Power cylinder, valve train or injector problem, circuit |
| P0279 |
a b |
INJ |
Injector circuit low — Cylinder 7 |
Harness short to ground |
| P0280 |
— |
INJ |
Injector circuit high — Cylinder 7 |
Miswired connector or harness |
| P0281 |
— |
PCED |
Cylinder 7 contribution/balance fault |
Power cylinder, valve train or injector problem, circuit |
| P0282 |
a b |
INJ |
Injector circuit low — Cylinder 8 |
Harness short to ground |
| P0283 |
— |
INJ |
Injector circuit high — Cylinder 8 |
Miswired connector or harness |
| P0284 |
— |
PCED |
Cylinder 8 contribution/balance fault |
Power cylinder, valve train or injector problem, circuit |
| P0301 |
b |
INJ |
Fault cylinder 1 — Misfire detected |
Mechanical engine failure |
| P0302 |
b |
INJ |
Fault cylinder 2 — Misfire detected |
Mechanical engine failure |
| P0303 |
b |
INJ |
Fault cylinder 3 — Misfire detected |
Mechanical engine failure |
| P0304 |
b |
INJ |
Fault cylinder 4 — Misfire detected |
Mechanical engine failure |
| P0305 |
b |
INJ |
Fault cylinder 5 — Misfire detected |
Mechanical engine failure |
| P0306 |
b |
INJ |
Fault cylinder 6 — Misfire detected |
Mechanical engine failure |
| P0307 |
b |
INJ |
Fault cylinder 7 — Misfire detected |
Mechanical engine failure |
| P0308 |
b |
INJ |
Fault cylinder 8 — Misfire detected |
Mechanical engine failure |
| P0340 |
— |
CMP |
Camshaft position sensor ckt. malfunction |
Open/grounded circuit, sensor fault, short to power |
| P0341 |
b |
CMP |
Camshaft position sensor ckt. performance |
Harness routing, charging circuit, sensor |
| P0344 |
a b |
CMP |
Camshaft position sensor ckt. intermittent |
Harness routing, charging ckt., sensor, int. ckt., improper
gap |
| P0380 |
b |
GP |
Glow plug circuit malfunction |
Open/grounded ckt., solenoid open/shorted, failed PCM |
| P0381 |
b |
GP |
Glow plug indicator circuit malfunction |
Open/grounded circuit, lamp open, failed PCM |
| P0460 |
— |
FLI |
Fuel level sensor circuit malfunction |
Open/short circuit, cluster, tank unit, open case GND |
| P0470 |
— |
EBP |
Exhaust back pressure sensor circuit malfunction |
Biased sensor, open signal return |
| P0471 |
b |
EBP |
Exhaust back pressure sensor circuit performance |
Plugged, stuck or leaking hose |
| P0472 |
b |
EBP |
Exhaust back pressure sensor circuit low input |
Open/grounded circuit, biased sensor, PCM |
| P0473 |
b |
EBP |
Exhaust back pressure sensor circuit high input |
Circuit shorted to 5v, biased sensor, PCM |
| P0475 |
b |
EPR |
Exhaust pressure control valve malfunction |
Open/grounded ckt., solenoid open/shorted, failed PCM |
| P0476 |
— |
EPR |
Exhaust pressure control valve performance |
Failed/stuck EPR control, EBP fault, EPR circuit |
| P0478 |
b |
EPR |
Exhaust pressure control valve high input |
Plugged sensor line, stuck butterfly, restricted exhaust |
| P0500 |
b |
VSS |
Vehicle speed sensor malfunction |
Sensor, circuit, PCM, PSOM, TR failure, low trans. fluid |
| P0503 |
— |
VSS |
Vehicle speed sensor noisy |
Harness routing, sensor |
| P0541 |
— |
MIAH |
Manifold intake air heater... |
Open/short circuit |
| P0542 |
— |
MIAH |
Manifold intake air heater... |
Grounded circuit |
| P0560 |
— |
PCED |
System voltage malfunction |
Charging system problem/load, glow plugs still enabled |
| P0562 |
b |
PCED |
System voltage low |
Low sys. voltage, charging sys., internal PCM failure |
| P0563 |
— |
PCED |
System voltage high |
High sys. voltage, charging sys., internal PCM failure |
| P0565 |
— |
PCED |
Cruise "On" signal malfunction |
Open or short circuit, switch failure, PCM failure or failed
to activate switch during KOER switch test |
| P0566 |
— |
PCED |
Cruise "Off" signal malfunction |
Open or short circuit, switch failure, PCM failure or failed
to activate switch during KOER switch test |
| P0567 |
— |
PCED |
Cruise "Resume" signal malfunction |
Open or short circuit, switch failure, PCM failure or failed
to activate switch during KOER switch test |
| P0568 |
— |
PCED |
Cruise "Set" signal malfunction |
Open or short circuit, switch failure, PCM failure or failed
to activate switch during KOER switch test |
| P0569 |
— |
PCED |
Cruise "Coast" signal malfunction |
Open or short circuit, switch failure, PCM failure or failed
to activate switch during KOER switch test |
| P0571 |
— |
BPA |
Brake switch A circuit malfunction |
Cruise control codes will be set on every switch test on
vehicles not equipped with cruise control |
| P0603 |
— |
PCED |
Internal control module KAM error |
Open PCM pin, disconnect B+, faulty PCM |
| P0605 |
— |
PCED |
Internal control module ROM error |
Internal PCM failure |
| P0606 |
— |
PCED |
PCM processor fault |
Internal PCM failure |
| P0640 |
— |
MIAH |
Manifold intake air heater... |
Circuit open or shorted to ground |
| P0670 |
— |
GPCM |
GPCM Glow plug control module control line failure |
Open/shorted circuit, open/shorted GPCM, failed PCM |
| P0671 |
— |
GPCM |
Glow plug #1 circuit failure |
Open/shorted circuit, faulty glow plug, failed GPCM |
| P0672 |
— |
GPCM |
Glow plug #2 circuit failure |
Open/shorted circuit, faulty glow plug, failed GPCM |
| P0673 |
— |
GPCM |
Glow plug #3 circuit failure |
Open/shorted circuit, faulty glow plug, failed GPCM |
| P0674 |
— |
GPCM |
Glow plug #4 circuit failure |
Open/shorted circuit, faulty glow plug, failed GPCM |
| P0675 |
— |
GPCM |
Glow plug #5 circuit failure |
Open/shorted circuit, faulty glow plug, failed GPCM |
| P0676 |
— |
GPCM |
Glow plug #6 circuit failure |
Open/shorted circuit, faulty glow plug, failed GPCM |
| P0677 |
— |
GPCM |
Glow plug #7 circuit failure |
Open/shorted circuit, faulty glow plug, failed GPCM |
| P0678 |
— |
GPCM |
Glow plug #8 circuit failure |
Open/shorted circuit, faulty glow plug, failed GPCM |
| P0683 |
— |
GPCM |
GPCM glow plug control module communication line failure |
Open/shorted circuit, failed GPCM, failed PCM |
| P0703 |
— |
BOO |
Brake switch B circuit malfunction |
Open/short circuit, switch, PCM, failed to activate switch
during KOER switch test |
| P0704 |
c |
CPP |
Clutch switch input circuit malfunction; F650-F750 with
Allison AT545: neutral switch |
Open/short circuit, switch, PCM, failed to activate switch
during KOER switch test |
| P0705 |
b |
TR |
TR sensor circuit malfunction |
Resistance in circuit, faulty sensor, PCM |
| P0707 |
— |
TR |
TR sensor circuit low input |
Open in circuit, biased sensor, PCM |
| P0708 |
b |
TR |
TR sensor circuit high input |
Open in circuit, biased sensor, PCM, short to power |
| P0712 |
d |
TFT |
Trans. fluid temp. sensor ckt. low input |
Short to ground, biased sensor, PCM |
| P0713 |
d |
TFT |
Trans. fluid temp. sensor ckt. high input |
Open in circuit, biased sensor, PCM, short to power |
| P0715 |
b d |
TSS |
TSS sensor circuit malfunction |
Short/open circuit, sensor, PCM |
| P0717 |
d |
TSS |
TSS intermittent failure |
Short/open circuit, sensor, PCM |
| P0718 |
— |
TSS |
Noisy TSS |
Erratic signal, sensor, intermittent circuit |
| P0720 |
b d |
OSS |
OSS sensor circuit malfunction |
Short/open circuit, sensor, PCM |
| P0721 |
— |
OSS |
Noisy OSS |
Erratic signal, sensor, intermittent circuit |
| P0722 |
d |
OSS |
OSS intermittent failure |
Short/open circuit, sensor, PCM |
| P0732 |
— |
GRV |
Gear 2 incorrect ratio |
Mechanical/hydraulic failure, 4x4 switch failure |
| P0733 |
— |
GRV |
Gear 3 incorrect ratio |
Mechanical/hydraulic failure, 4x4 switch failure |
| P0741 |
— |
TCC |
Torque converter clutch ckt. performance |
Circuit failure, faulty solenoid, PCM |
| P0743 |
b d |
TCC |
Torque converter clutch system electrical |
Faulty solenoid, circuit, PCM |
| P0750 |
b |
SS1 |
Shift solenoid A malfunction |
Circuit failure, faulty solenoid, PCM |
| P0755 |
b d |
SS2 |
Shift solenoid B malfunction |
Circuit failure, faulty solenoid, PCM |
| P0781 |
d |
— |
1-2 Shift malfunction |
Circuit failure, faulty solenoid, faulty clutch, PCM |
| P0782 |
d |
— |
2-3 Shift malfunction |
Circuit failure, faulty solenoid, faulty clutch, PCM |
| P0783 |
d |
— |
3-4 Shift malfunction |
Circuit failure, faulty solenoid, faulty clutch, PCM |
| P1000 |
— |
N/A |
OBDII monitor status |
OBDII monitors/drive cycle incomplete |
| P1105 |
— |
ALT |
Dual alternator upper fault (monitor) |
Circuit failure, alternator failure, PCM |
| P1106 |
— |
ALT |
Dual alternator lower fault (control) |
Circuit failure, alternator failure, PCM |
| P1107 |
b |
ALT |
Dual alternator lower circuit malf. (control) |
Circuit failure, alternator failure, PCM |
| P1108 |
— |
ALT |
Dual alternator BATT lamp ckt. malf. |
Open/short circuit, lamp, fuse, PCM |
| P1118 |
b |
MAT |
Manifold air temp sensor out of range low |
Short to GND MAT circuit, MAT sensor |
| P1119 |
b |
MAT |
Manifold air temp sensor out of range high |
Open/short to PWR circuit, MAT sensor |
| P1139 |
— |
WIFIL |
Water in fuel lamp circuit malfunction |
WIF lamp, circuit failure, fuse, PCM |
| P1140 |
— |
WIF |
Water in fuel condition |
Water in fuel, grounded circuit, shorted sensor, PCM |
| P1184 |
— |
TEST |
Engine oil temp out of self test range |
Engine too cold/hot, leaking thermostat, ckt., sensor |
| P1209 |
b |
IPR |
ICP system fault |
IPR valve stuck |
| P1210 |
b |
ICP |
ICP above expected level |
ICP sensor, open signal return |
| P1211 |
a b |
IPR |
ICP pressure above/below desired |
IPR valve failed, stuck, or shorted to ground |
| P1212 |
— |
ICP |
ICP voltage not at expected level |
Biased sensor or ckt., open signal return, low oil in
reservoir |
| P1218 |
b |
PCM/IDM |
CID stuck high |
CID circuit open, probably intermittent |
| P1219 |
b |
PCM/IDM |
CID stuck low |
CID circuit short to ground, probably intermittent |
| P1247 |
b |
MAP |
Turbo boost pressure low |
MAP hose, sensor, EBP sys, intake leaks, turbo |
| P1248 |
b |
MAP |
Turbo boost pressure not detected |
MAP hose, sensor, EBP sys, intake leaks, turbo |
| P1249 |
b |
WG |
Waste gate steady state failure |
GND short, plugged hose/port, solenoid, actuator |
| P1260 |
— |
NA |
Electronic positive anti-theft system failure |
Refer to appropriate workshop manual. |
| P1261-P1268 |
— |
INJ |
High to low side short cyl. # 1-8 |
Short circuit, shorted injector, failed IDM |
| P1271-P1278 |
— |
INJ |
High to low side open cyl. # 1-8 |
Open circuit, open injector, failed IDM |
| P1280 |
a b |
ICP |
ICP circuit out of range low |
Open/grounded circuit, biased sensor, PCM |
| P1281 |
a b |
ICP |
ICP circuit out of range high |
Circuit shorted to 5v, biased sensor, PCM |
| P1282 |
a b |
IPR |
Excessive ICP pressure |
Faulty IPR regulator (sticking), IPR short to ground |
| P1283 |
— |
IPR |
IPR circuit failure |
Open/grounded circuit, stuck IPR, loose connection |
| P1284 |
— |
N/A |
ICP failure — aborts KOER CCT test |
See codes P1280, P1281, P1282, P1283, P1211 |
| P1291 |
— |
INJ |
High side # 1 (right) short to grd. or B+ |
Short circuit, faulty IDM |
| P1292 |
— |
INJ |
High side # 2 (left) short to grd. or B+ |
Short circuit, faulty IDM |
| P1293 |
— |
INJ |
High side open bank No. 1 (right) |
Open circuit, faulty IDM |
| P1294 |
— |
INJ |
High side open bank No. 2 (left) |
Open circuit, faulty IDM |
| P1295 |
a b |
INJ |
Multiple faults on bank No. 1 (right) |
Miswired connector or harness, short to ground |
| P1296 |
a b |
INJ |
Multiple faults on bank No. 2 (left) |
Miswired connector or harness, short to ground |
| P1297 |
— |
INJ |
High sides shorted together |
Shorted wires, faulty IDM |
| P1298 |
— |
PCED |
IDM failure |
Internal IDM failure |
| P1316 |
a b |
IDM |
Injector circuit/IDM codes detected |
Injector circuit failure/IDM codes detected |
| P1397 |
— |
VPWR |
System voltage out of self test range |
Voltage too high or low for glow plug monitor test |
| P1464 |
— |
N/A |
A/C on during KOER CCT test |
Operator error, A/C circuit shorted to power |
| P1501 |
— |
N/A |
Vehicle moved during testing |
Operator error |
| P1502 |
— |
TEST |
Invalid test — APCM functioning |
APCM active while KOER test is running |
| P1531 |
— |
N/A |
Invalid test — accelerator pedal movement |
Accelerator moved during KOER on-demand or CCT test |
| P1536 |
— |
PBA |
Parking brake applied fail |
Circuit, switch, PCM, failed to activate switch KOER |
| P1660 |
— |
PCED |
OCC signal high |
High system voltage, internal PCM fault |
| P1661 |
— |
PCED |
OCC signal low |
Low system voltage, internal PCM fault |
| P1662 |
— |
PCED |
IDM EN circuit failure |
Open relay, blown fuse, open/grounded circuit |
| P1663 |
— |
PCM/IDM |
FDCS circuit failure |
Open/grounded circuit, faulty IDM |
| P1667 |
— |
PCM/IDM |
CID circuit failure |
Open/grounded circuit, faulty IDM |
| P1668 |
— |
PCM/IDM |
PCM/IDM diag. communication error |
Open/shorted EF or FDCS wire, open IDM grd. |
| P1670 |
b |
EF |
EF signal not detected |
Open/shorted EF circuit |
| P1690 |
b |
WG |
Waste gate failure |
WGC circuit or solenoid, PCM |
| P1702 |
d |
TRS |
TRS sensor intermittent circuit malfunction |
Sensor, wiring, PCM, mechanical alignment |
| P1704 |
— |
TRS |
Digital TRS failed to transition state |
Sensor, wiring, PCM, mechanical alignment |
| P1705 |
— |
TR |
TR sensor out of self-test range |
Operator error, circuit failure, faulty sensor, PCM |
| P1711 |
— |
TFT |
TFT sensor out of self-test range |
Circuit failure, faulty sensor, PCM |
| P1713 |
d |
TFT |
TFT stuck in range low — below 50°F |
Sensor, circuit, PCM |
| P1714 |
b |
SS1 |
Shift solenoid 1 inductive |
Circuit, solenoid, PCM |
| P1715 |
b |
SS2 |
Shift solenoid 2 inductive |
Circuit, solenoid, PCM |
| P1718 |
d |
TFT |
TFT stuck in range high — above 250°F |
Sensor, circuit, PCM |
| P1728 |
d |
TCC |
Transmission slip error |
Solenoid failure or mechanical failure |
| P1729 |
d |
4x4L |
4x4L low switch error |
Circuit failure, faulty switch, PCM |
| P1744 |
b |
TCC |
Converter not functioning |
Converter solenoid/hydraulic/mechanical failure |
| P1746 |
d |
EPC |
EPC solenoid open circuit |
Open circuit, faulty solenoid, PCM |
| P1747 |
b |
EPC |
EPC solenoid short circuit |
Short circuit, faulty solenoid, PCM shorted to ground |
| P1754 |
— |
CCS |
Coast clutch solenoid ckt. malfunction |
Circuit failure, faulty solenoid, PCM |
| P1760 |
d |
EPC |
EPC solenoid short intermittent |
Switch not detected during self test, circuit, switch |
| P1780 |
— |
TCS |
TCS circuit out of self-test range |
Circuit, switch, PCM, failed to activate switch KOER |
| P1781 |
— |
4x4L |
4x4L circuit out of self-test range |
Operator error, short to ground, PCM |
| P1783 |
d |
TFT |
Transmission overtemperature condition |
Internal trans. failure, circuit failure, sensor, PCM |
| P1902 |
e |
KDS |
Kickdown solenoid relay — control circuit failure |
Blown fuse, failed relay, open control circuit, faulty PCM,
faulty wiring |
| P1903 |
e |
KDS |
Kickdown solenoid circuit — low voltage |
Blown fuse, failed relay, open control circuit, faulty PCM |
| P1904 |
e |
KDS |
Kickdown solenoid circuit — high voltage |
Blown fuse, failed relay, open control circuit, faulty PCM,
open in ASMM (circuit #175) |
