Freightliner OBD/OBD2 Codes – TroubleCodes.net (2024)

Freightliner has built Sprinter vans under an agreement with Mercedes since 2003. These OBD2 codes apply only to Freightliner Sprinter van models below.

OBD2 Code Lists (Light Duty Vans)

Model	Year	Engine identification	System
Sprinter 2.7L CDI	2003-06	VIN position 7 & 8 =41	Bosch EDC 15C
Sprinter 3.0L TD	2007	VIN position 7 & 8 =45	–
Sprinter 3.5L	2007	VIN position 7 & 8 =46	–

OBD1 Codes

Freightliner and Detroit Diesel are both owned by Daimler which is why most Freightliners have Detroit Diesel engines with OBD codes as below.

Fault Codes for Freightliner HD Truckswith Detroit Series 60 Engines with DTEC II

To Read Codes: Use diagnostic data reader or short pin A to pin M. The latter method will flash codes at the CEL.

Codes are two digits and consist oftwo sets of flashes separated by a long pause.

DTEC II Error Code	Description
11	Power Take-off Sensor Lo Volt
12	Power Take-off Sensor Hi Volt
13	Coolant Sensor Lo Volt
14	Eng Temp Sensor Hi Volt
15	Eng Temp Sensor Lo Volt
16	Coolant Sensor Hi Volt
21	Throttle Pos Sensor Hi Volt
22	Throttle Pos Sensor Lo Volt
23	Fuel Temp Sensor Hi Volt
24	Fuel Temp Sensor Lo Volt
25	No Codes
26	Power Control Enabled
31	Fault on Auxiliary Output
32	ECM Backup System Fail
33	Turbo Bst Sensor Hi Volt
34	Turbo Bst Sensor Lo Volt
35	Oil Prs Sensor Hi Volt
36	Oil Prs Sensor Lo Volt
37	Fuel Prs Sensor Hi Volt
38	Fuel Prs Sensor Lo Volt
41	Timing Reference Sensor
42	Synchronous Ref Sensor
43	Low Coolant Level
44	Engine Over Temperature
45	Low Oil Pressure
46	Low Battery Voltage
47	Hi Fuel Pressure
48	Lo Fuel Pressure
51	EEPROM Error
52	ECM – A/D Fail
53	EEPROM Memory Failure
54	Vehicle Speed Sensor
55	Proprietary Comm. Link
56	ECM – A/D Fail
58	Cruise Ctl/Press Gov Ctl Switch
61-68	Inj Response Time Long
71-78	Inj Response Time Short
84	Crankcase Pressure Hi
85	Engine Overspeed
86	Press Gov Ctl – Hi Volt
87	Press Gov Ctl – Lo Volt

Flash Codes for Detroit Series 60 with DTEC III / IV electronic control systems.

To read codes, use the diagnostic data reader or depress and hold the diagnostic
request switch with the ignition on, engine at idle or not running. Press and hold the switch.
Active codes will be flashed on the “Stop Engine” light (SEL) followed by the inactive codes
being flashed on the “Check Engine” Light (CEL). The cycle will repeat until the operator
releases the diagnostic request switch.
Please note: Codes 43, 44, and 45 are critical codes and if they are shown, the Stop Engine Light will come on which causes the engine protections to engage and your engine may shut down.
All other codes will cause the Check Engine Light to come on which will not engage the engine protections and will allow the engine to continue running.

DTEC III / IV Flash Code	Description
11	VSG Sensor Input Voltage Low
12	VSG Sensor Input Voltage High
13	Coolant level Sensor (CLS) Voltage Low
14	Oil or Coolant Temperature Sensor (OTS or CTS) Voltage High
15	Oil or Coolant Temperature Sensor (OTS or CTS) Voltage Low
16	Coolant Level Sensor (CLS) Voltage High
17	Bypass or Throttle, Valve Position Sensor Input Voltage High
18	Bypass or Throttle, Valve Position Sensor Input Voltage Low
21	Throttle Position Sensor (TPS) Voltage High
22	Throttle Position Sensor (TPS) Voltage Low
23	Fuel Temperature Sensor (FTS) Voltage High
24	Fuel Temperature Sensor (FTS) Voltage Low
25	No Codes
26	Auxiliary Engine Shutdown #1 or #2 Input Active
27	Air Inlet or Intake Air, Temperature Sensor Input Volage High
28	Air Inlet or Intake Air, Temperature Sensor Input Volage Low
31	Engine Brake Output Open Circuit or Short to Ground
32	CEL or SEL Short to Battery or Open Circuit
33	Turbo Boost Sensor (TBS) Voltage High
34	Turbo Boost Sensor (TBS) Voltage Low
35	Oil Pressure Sensor (OPS) Voltage High
36	Oil Pressure Sensor (OPS) Voltage Low
37	Fuel Pressure Sensor (FPS) Voltage High
38	Fuel Pressure Sensor (FPS) Voltage Low
41	Timing Reference Sensor (TRS)
42	Synchronous Reference Sensor (SRS)
43	Low Coolant
44	Oil or Coolant High Temperature
45	Low Oil Pressure
46	Low Battery Voltage
47	Fuel, Air Inlet, or Turbo Boost Pressure High
48	Fuel or Air Inlet Pressure Low
51	EEPROM Error
52	ECM – Analog to Digital Failure
53	EEPROM Non-Volatile Memory Failure
54	Vehicle Speed Sensor Fault
55	J1939 Data Link Failure
56	J1587 Data Link Failure
57	J1922 Data Link Failure
61	Injector Response Time Too Long
62	Auxiliary Output Short ot Battery or Open Circuit or Mech Fault
63	PWM Drive Short to Battery or Open Circuit
64	Turbo Speed Sensor Input Fault
65	Throttle Valve Position Input Fault
66	Engine Knock Sensor Input Fault
67	Coolant or Air Inlet Pressure Sensor Input Voltage High
68	Idle Validation Switch Open Circuit or Short to Ground
71	Injector Response Time Too Short
72	Vehicle Overspeed
73	Gas Valve Position Input Fault or ESS Fault
74	Optimized Idle Safety Look Short to Ground
75	ECM Battery Voltage High
76	Engine Overspeed with Engine Brake
77	Fuel Temperature High
81	Dual Fuel BOI or Exhaust Temperature Voltage High
82	Dual Fuel BOI or Exhaust Temperature Voltage Low
83	Exhaust Temperature or External Pump Pressure High
85	Engine Overspeed
86	External Pump Pressure Sensor Input Voltage High
87	External Pump Pressure Sensor Input Voltage Low

Fault Codes for DD 15

DD15 engines have three different modules with different fault codes.

ACM (Aftertreatment Control Module)– the ACM looks just like the MCM and will be located near the emission control equipment on the frame rail or a mounting bracket. The ACM can be difficult to find and may even be located inside the frame rail in a hard to access location (size: 11.5″ wide x 8″ deep by 2″ tall)
CPC (Common Powertrain Controller)– a VHS tape size black plastic box (size: 7″ wide x 4.5″ deep by 1.5″ tall) will be somewhere inside the cab and is often located under the dash or under the passenger seat (but this can vary from truck to truck).
MCM (Motor Control Module)– will be bolted onto the side of the engine (size: 11.5″ wide x 8″ deep by 2″ tall).

DD15 GHG14 ACM2.1 Fault Codes

DD15 GHG14 CPC4 Fault Codes

DD15 GHG14 MCM2.1 Fault Codes