DTC Codes-Definitions

[MAV]

With alot of members having a tuner that can read codes, I thought it would be nice to have a guide to cross these codes to see what they mean. I am posting the more popular ones relating to engine and trans. Keep in mind there are hundreds more codes lot listed.

I can look up any code instead of calling the dealer.

List:

DTC C0323 T-Case Lock Circuit Low
DTC C0324 T-Case Lock Circuit High
DTC C0550 ECU Malfunction
DTC P0087 Fuel Rail Pressure (FRP) Too Low
DTC P0088 Fuel Rail Pressure (FRP) Too High
DTC P0089 Fuel Pressure Regulator Performance
DTC P0090 Fuel Pressure Regulator Control Circuit
DTC P0093 Fuel System Large Leak Detected
DTC P0094 Fuel System Small Leak Detected
DTC P0101 Mass Air Flow (MAF) Sensor Performance
DTC P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency
DTC P0103 Mass Air Flow (MAF) Sensor Circuit High Frequency
DTC P0168 Engine Fuel Overtemperature
DTC P0171 or P0174 Fuel Trim System Lean
DTC P0172 or P0175 Fuel Trim System Rich
DTC P0181 Fuel Temperature Sensor Performance
DTC P0182 Fuel Temperature Sensor Circuit Low Voltage
DTC P0183 Fuel Temperature Sensor Circuit High Voltage
DTC P0192 Fuel Rail Pressure (FRP) Sensor Circuit Low Voltage
DTC P0193 Fuel Rail Pressure (FRP) Sensor Circuit High Voltage
DTC P0200 Injector Control Circuit
DTC P0201-P0208 Injector Control Circuit
DTC P0218 Transmission Fluid Overtemperature
DTC P0230 Fuel Pump Relay Control Circuit
DTC P0234 Engine Overboost
DTC P0236 Turbocharger Boost System Performance
DTC P0237 Turbocharger Boost Sensor Circuit Low Voltage
DTC P0238 Turbocharger Boost Sensor Circuit High Voltage
DTC P0300 Engine Misfire Detected
DTC P0301-P0308 Engine Misfire Detected
DTC P0325 Knock Sensor Module Performance
DTC P0327 Knock Sensor (KS) 1 Circuit
DTC P0380 Glow Plug Feedback Circuit
DTC P0401 Exhaust Gas Recirculation (EGR) Flow Insufficient
DTC P0404 Exhaust Gas Recirculation (EGR) Open Position Performance
DTC P0405 Exhaust Gas Recirculation (EGR) Position Sensor Circuit Low Voltage
DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681, or P1683 ECU Malfunction
DTC P0611 Fuel Injector Control Module Performance
DTC P0612 Fuel Injector Control Module Relay Control Circuit
DTC P0740 TCC Enable Solenoid Circuit Electrical
DTC P0741 TCC System Stuck Off
DTC P0742 TCC System Stuck On
DTC P0748 Pressure Control Solenoid Circuit Electrical
DTC P0751 1-2 Shift Solenoid Valve Performance
DTC P0752 1-2 Shift Solenoid (SS) Valve Performance - No Second Or Third Gear
DTC P0753 1-2 Shift Solenoid Circuit Electrical
DTC P0756 2-3 Shift Solenoid Valve Performance
DTC P0757 2-3 Shift Solenoid (SS) Valve Performance - No Third Or Fourth Gear
DTC P0758 2-3 Shift Solenoid Circuit Electrical
DTC P0763 Shift Solenoid (SS) 3 Control Circuit High Voltage
DTC P0768 Shift Solenoid (SS) 4 Control Circuit High Voltage
DTC P0773 Torque Converter Clutch (TCC) Enable Solenoid Control Circuit
DTC P1125 Accelerator Pedal Position (APP) System
DTC P1172 Sec Fuel Pump Insufficient/No Fuel Flow
DTC P1258 Engine Coolant Overtemperature - Protection Mode Active
DTC P1261 Injector Positive Voltage Control Circuit
DTC P1262 Injector Positive Voltage Control Circuit Group 2
DTC P1404 Exhaust Gas Recirculation (EGR) Closed Position Performance
DTC P1550 Fuel Injector Control Module System Voltage
DTC P1643 Wait to Start Lamp Control Circuit
DTC P1658 Fuel Injector Control Module Driver Performance
DTC U1800 Lost Communications With Fuel Injector Control Module (FICM)
DTC P1870 Transmission Component Slipping

[RWTD]

Here bud, use this link as well, as it can prove to be very useful!

http://www.autotap.com/codes.asp

Sincerely...

[Kennedy]

FYI the code reader in the review linked below will display the actual description making life much easier. There are less expensive readers out there, but most do not include the description which is why I chose this model:

http://www.thedieselpage.com/reviews/quicklynks.htm

[hrsedrvr]

im reading a

PO380
PO621

any ideas what to do or check?

[More Power]

im reading a

PO380
PO621

any ideas what to do or check?

P0380 indicates a problem with the glow plug system. P0621 - GEN Lamp 'L' Control Circuit, which may indicate a problem reading the alternator control circuit.

Both of these codes indicate an electrical problem. Bad alternator, bad batteries, loose connections or bad grounds could be a problem.

Jim

[hrsedrvr]

kind of like a needle in in a haystack deal,lol
anyone ever have these codes and find something?
to give me a place to start looking

[chessy56]

My '17 DMax (L5P) is showing a P10D1 code. Not finding much on it, other than it might be related to the DEF system. (The little I found about it also mentioned a P20EE code, but I'm not getting that one).

Anyone have any ideas? I just dumped a jug of Blue DEF into it this past weekend. I've got less than 300 miles on it since and the engine constantly goes into the regen mode. I figure I've sucked up nearly 1/8 of a tank of fuel due to this (according to my fuel gauge). NO check engine indicator has come on- I'm seeing it listed using my Edge monitor.

[DieselDavy]

While I like to diddle with my own stuff, I'd have that rig in the dealer shop right now while it's still on them. But that's just me.
Dave