Question 1

What does Johnson code 16 mean?

Accepted Answer

Code 16 on a Johnson outboard indicates: CPS (Crank Position) Fault. Resolution: Check sensor and flywheel. (Severity: HIGH)

Question 2

What does Johnson code 17 mean?

Accepted Answer

Code 17 on a Johnson outboard indicates: 55V Alternator (Low). Resolution: Check stator and capacitor. (Severity: HIGH)

Question 3

What does Johnson code 18 mean?

Accepted Answer

Code 18 on a Johnson outboard indicates: 55V Alternator (High). Resolution: Check voltage regulator. (Severity: HIGH)

Question 4

What does Johnson code 25 mean?

Accepted Answer

Code 25 on a Johnson outboard indicates: EMM Temp (High). Resolution: Check EMM cooling lines for clogs. (Severity: HIGH)

Question 5

What does Johnson code 26 mean?

Accepted Answer

Code 26 on a Johnson outboard indicates: Injector Circuit Fault. Resolution: Check injector wiring harness. (Severity: HIGH)

Question 6

What does Johnson code 29 mean?

Accepted Answer

Code 29 on a Johnson outboard indicates: EMM Overheat Shutdown. Resolution: STOP ENGINE. EMM is overheating. (Severity: CRITICAL)

Question 7

What does Johnson code 31 mean?

Accepted Answer

Code 31 on a Johnson outboard indicates: Engine Overheat. Resolution: STOP ENGINE IMMEDIATELY. Cooling failure. (Severity: CRITICAL)

Question 8

What does Johnson code 33 mean?

Accepted Answer

Code 33 on a Johnson outboard indicates: No Oil / Oil Fault. Resolution: STOP ENGINE. Check oil tank and prime system. (Severity: CRITICAL)

Question 9

What does Johnson code 37 mean?

Accepted Answer

Code 37 on a Johnson outboard indicates: Water in Fuel. Resolution: Drain on-engine fuel filter. (Severity: HIGH)

Question 10

What does Johnson code 57 mean?

Accepted Answer

Code 57 on a Johnson outboard indicates: Engine Temperature High. Resolution: Reduce load. Check water pump. (Severity: CRITICAL)

Question 11

What does Johnson code 100 mean?

Accepted Answer

Code 100 on a Johnson outboard indicates: Low Oil Pressure. Resolution: STOP IMMEDIATELY. Check oil system. (Severity: CRITICAL)

Question 12

What does Johnson code 161 mean?

Accepted Answer

Code 161 on a Johnson outboard indicates: Fused B+ Circuit Fault. Resolution: Check main power fuses and relays. (Severity: HIGH)

Johnson Fault Codes

How to Read Johnson Codes

Code	Fault Description	Severity	Required Action
11	TPS Out of Idle Range	MEDIUM	Check throttle cable and TPS sensor.
16	CPS (Crank Position) Fault	HIGH	Check sensor and flywheel.
17	55V Alternator (Low)	HIGH	Check stator and capacitor.
18	55V Alternator (High)	HIGH	Check voltage regulator.
23	EMM Temp Sensor Fault	MEDIUM	EMM sensor circuit failure.
25	EMM Temp (High)	HIGH	Check EMM cooling lines for clogs.
26	Injector Circuit Fault	HIGH	Check injector wiring harness.
29	EMM Overheat Shutdown	CRITICAL	STOP ENGINE. EMM is overheating.
31	Engine Overheat	CRITICAL	STOP ENGINE IMMEDIATELY. Cooling failure.
33	No Oil / Oil Fault	CRITICAL	STOP ENGINE. Check oil tank and prime system.
37	Water in Fuel	HIGH	Drain on-engine fuel filter.
57	Engine Temperature High	CRITICAL	Reduce load. Check water pump.
100	Low Oil Pressure	CRITICAL	STOP IMMEDIATELY. Check oil system.
161	Fused B+ Circuit Fault	HIGH	Check main power fuses and relays.