Q: What does Deutz fault code Code 2-1-4 / SPN 729 FMI 3 mean?

Code 2-1-4 / SPN 729 FMI 3 (Ignition / Air): White Exhaust Smoke / Cold No-Start Fix: LOGIC: Intake Air Pre-heater Relay / Grid Heater Circuit High. ACTION: Inspect grid heater relay contact terminals under the intake manifold. Check for short to 24V/12V battery power on control lines or a dead relay coil.

Q: What does Deutz fault code Code 3-1-1 / SPN 110 FMI 0 mean?

Code 3-1-1 / SPN 110 FMI 0 (Cooling): Red Stop Lamp / Active Engine Derate Fix: LOGIC: Engine Coolant Temperature Exceeds High Critical Limit (>105°C). ACTION: Clean debris out of radiator/oil cooler core matrix. Check coolant level in surge tank and inspect thermostat opening temperature and fan belt tension.

Question 1

What does Deutz fault code Code 1-1-1 / SPN 94 FMI 1 mean?

Accepted Answer

Code 1-1-1 / SPN 94 FMI 1 (Fuel System): Engine Sags under Heavy Load / Stalls Fix: LOGIC: Low Pressure Fuel Supply Pressure Below Limit.

ACTION: Replace primary fuel filter and water separator element. Check electric/mechanical lift pump supply delivery pressure (>2.5 bar spec) and inspect tank pickup tube screen.

Question 2

What does Deutz fault code Code 1-1-3 / SPN 157 FMI 18 mean?

Accepted Answer

Code 1-1-3 / SPN 157 FMI 18 (Fuel System): Limp Mode / Reduced Engine Output Fix: LOGIC: Fuel Rail / Unit Pump Rail Pressure Below Target.

ACTION: Check high-pressure unit pump solenoids. Test mechanical fuel pressure relief valve (PRV) for seat leakage into return line.

Question 3

What does Deutz fault code Code 2-1-1 / SPN 190 FMI 0 mean?

Accepted Answer

Code 2-1-1 / SPN 190 FMI 0 (Engine Speed): Engine Shuts Down / Red Lamp On Fix: LOGIC: Crankshaft Engine Overspeed Limit Exceeded.

ACTION: Check EMR memory logs for over-rev events. Inspect flywheel inductive speed pickup sensor tip for metallic debris or incorrect air gap (spec: 0.8–1.2 mm).

Question 4

What does Deutz fault code Code 2-1-2 / SPN 190 FMI 2 mean?

Accepted Answer

Code 2-1-2 / SPN 190 FMI 2 (Engine Speed): Extended Crank / Hard Start / Surging Fix: LOGIC: Crankshaft Speed Sensor Signal Speed Implausible / Erratic.

ACTION: Inspect crank sensor wiring for shield grounding damage. Clean flywheel reluctor teeth and verify sensor AC voltage output while cranking (>1.5V AC).

Question 5

What does Deutz fault code Code 2-1-3 / SPN 729 mean?

Accepted Answer

Code 2-1-3 / SPN 729 (Air Intake): White Exhaust Smoke / Cold No-Start Fix: LOGIC: Intake Air Pre-heater Relay / Grid Heater Circuit Open.

ACTION: Inspect grid heater relay power terminals under intake manifold. Check continuity through intake heating element grid using an ohmmeter (spec <1Ω).

Question 6

What does Deutz fault code Code 2-1-4 / SPN 729 FMI 3 mean?

Accepted Answer

Code 2-1-4 / SPN 729 FMI 3 (Ignition / Air): White Exhaust Smoke / Cold No-Start Fix: LOGIC: Intake Air Pre-heater Relay / Grid Heater Circuit High.

ACTION: Inspect grid heater relay contact terminals under the intake manifold. Check for short to 24V/12V battery power on control lines or a dead relay coil.

Question 7

What does Deutz fault code Code 3-1-1 / SPN 110 FMI 0 mean?

Accepted Answer

Code 3-1-1 / SPN 110 FMI 0 (Cooling): Red Stop Lamp / Active Engine Derate Fix: LOGIC: Engine Coolant Temperature Exceeds High Critical Limit (>105°C).

ACTION: Clean debris out of radiator/oil cooler core matrix. Check coolant level in surge tank and inspect thermostat opening temperature and fan belt tension.

Question 8

What does Deutz fault code Code 3-1-2 / SPN 110 FMI 4 mean?

Accepted Answer

Code 3-1-2 / SPN 110 FMI 4 (Cooling): Cooling Fan Runs Constant Max Speed Fix: LOGIC: Engine Coolant Temperature Sensor Signal Low (Short to Ground).

ACTION: Measure NTC sensor resistance across pins (spec ~2.5kΩ at 20°C). Inspect sensor harness near thermostat housing for insulation rub-through.

Question 9

What does Deutz fault code Code 3-1-3 / SPN 110 FMI 3 mean?

Accepted Answer

Code 3-1-3 / SPN 110 FMI 3 (Cooling): Engine Stays in Cold Warm-Up Maps Fix: LOGIC: Engine Coolant Temperature Sensor Signal High (Open Circuit).

ACTION: Check for broken wiring leads or uncoupled pins at the coolant temp sensor plug. Measure sensor resistance across operating temp range.

Question 10

What does Deutz fault code Code 4-1-1 / SPN 100 FMI 1 mean?

Accepted Answer

Code 4-1-1 / SPN 100 FMI 1 (Lubrication): Immediate Engine Shutdown Alarm Fix: LOGIC: Engine Oil Pressure Below Low Minimum Limit.

ACTION: Shut down immediately. Check engine oil level. Connect mechanical pressure gauge to main oil gallery port to confirm true pressure before replacing sensor.

Code	System	Symptom	Full fix
Code 1-1-1 / SPN 94 FMI 1	Fuel System	Engine Sags under Heavy Load / Stalls	View fix
Code 1-1-3 / SPN 157 FMI 18	Fuel System	Limp Mode / Reduced Engine Output	View fix
Code 2-1-1 / SPN 190 FMI 0	Engine Speed	Engine Shuts Down / Red Lamp On	View fix
Code 2-1-2 / SPN 190 FMI 2	Engine Speed	Extended Crank / Hard Start / Surging	View fix
Code 2-1-3 / SPN 729	Air Intake	White Exhaust Smoke / Cold No-Start	View fix
Code 2-1-4 / SPN 729 FMI 3	Ignition / Air	White Exhaust Smoke / Cold No-Start	View fix
Code 3-1-1 / SPN 110 FMI 0	Cooling	Red Stop Lamp / Active Engine Derate	View fix
Code 3-1-2 / SPN 110 FMI 4	Cooling	Cooling Fan Runs Constant Max Speed	View fix
Code 3-1-3 / SPN 110 FMI 3	Cooling	Engine Stays in Cold Warm-Up Maps	View fix
Code 4-1-1 / SPN 100 FMI 1	Lubrication	Immediate Engine Shutdown Alarm	View fix
Code 4-1-2 / SPN 100 FMI 4	Lubrication	Oil Warning Lamp On at Key-On	View fix
Code 5-1-1 / SPN 102 FMI 2	Air Intake	Black Exhaust / Sluggish Acceleration	View fix
Code 6-1-1 / SPN 651 FMI 5	Fuel System	Dead Misfire Cylinder 1 / Engine Shake	View fix
Code 6-1-2 / SPN 652 FMI 5	Fuel System	Dead Misfire Cylinder 2 / Engine Shake	View fix
Code 6-1-3 / SPN 653 FMI 5	Fuel System	Dead Misfire Cylinder 3 / Engine Shake	View fix
Code 6-1-4 / SPN 654 FMI 5	Fuel System	Dead Misfire Cylinder 4 / Engine Shake	View fix
Code 7-1-1 / SPN 91 FMI 2	Throttle / Controls	Engine Stuck at Idle / Dead Pedal	View fix
Code 8-1-1 / SPN 639 FMI 9	Communication	Dash Cluster Dead / Machine Lockout	View fix
Code 8-1-3 / SPN 168 FMI 1	Electrical	Multiple Random Faults / Hard Start	View fix
Code 9-1-1 / SPN 629 FMI 12	Computer	Engine Cranks No Start / Red Lamp Solid	View fix
Code 9-1-4 / SPN 108 FMI 2	Sensors / Air	Poor Altitude Performance / Black Smoke	View fix
P1088	Fuel System	Severe Power Derate / Engine Stalls	View fix
P1089	Fuel System	Hard Engine Misfire / Severe Derate	View fix
SPN 100 FMI 1	—	Low oil pressure alarm; Engine derate; Potential shutdown.	View fix
SPN 102 FMI 2	—	Turbo surge; Black smoke; Poor acceleration; Derate.	View fix
SPN 110 FMI 0	—	Overheating; Engine power loss; High-speed fan active.	View fix
SPN 157 FMI 1	—	Hard starting; Misfiring under load; Sudden engine stalling.	View fix
SPN 168 FMI 1	—	Starter clicks; Gauges dimming; ECM resets; Random fault codes.	View fix
SPN 523470 FMI 2	—	Low power; Engine in limp mode; Rail pressure erratic.	View fix
SPN 523612 FMI 12	—	Engine won't start; No communication with scanner; Dash says "No Engine Data."	View fix
SPN 639 FMI 9	—	Total machine freeze; All gauges "X" out; Engine won't start.	View fix
SPN 651 FMI 5	—	Engine knocking or "missing"; Significant vibration; Power loss.	View fix
SPN 91 FMI 3	—	Engine stuck at idle; No throttle response; Service lamp on.	View fix
SPN 97 FMI 3	—	Water in Fuel lamp on; Potential derate to protect injectors.	View fix

Deutz Fault Codes

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