CAT Engine 24176 Fault Code: Ether Injection Control Solenoid : Current Above Normal
Also called Engine Start Enable Device 1 : Current Above Normal, Ether Control Solenoid Current Above Normal, Ether Injection Control Solenoid - Current Above Normal, Ether Injection Control Solenoid Current High, Ether Injection Control Solenoid current high, Ether Injection Control Solenoid: Current Above Normal, Ether Injection Control Solenoid:Current Above Normal, ether Injection Control Solenoid : Current Above Normal
Ether Injection Control Solenoid : Current Above Normal · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
CAT code 24176 (SPN 626 / FMI 6) means the ECM has detected a high current condition in the circuit going to the ether injection control solenoid, most likely a short circuit. The ECM logs the code, may light a warning lamp or display message, and disables the ether injection system until the fault clears. This affects C11, C13, C15, C175, C18, C27, and C32 engines.
Medium severity. Ether injection is only a cold-weather starting aid, so the engine can still run and be driven normally. However, the fault disables that starting aid, which matters if you operate in cold climates, so it should be diagnosed before the next cold start rather than ignored indefinitely.
What does CAT Engine error code 24176 mean?
This code sets when the ECM detects a high current condition in the output circuit running from the ECM to the ether injection control solenoid. High current in this kind of driver circuit is typically caused by a short, either a short to ground in the wiring or a shorted solenoid coil, and the ECM interprets that as an unsafe condition and shuts the function down to protect itself and the circuit.
The ECM needs to have been powered for at least 2 seconds before it will evaluate and log this fault, so it is not a condition that trips instantly at key-on before the system has stabilized.
Because ether injection is a cold-start aid controlled by a temperature-based map (comparing coolant temperature, intake manifold air temperature, and atmospheric pressure), the system will not even attempt to fire unless conditions call for it. This code simply means the ECM cannot safely drive the solenoid even if those conditions are met, so the system stays disabled until repaired.
What triggers a CAT Engine 24176 code?
The ECM logs 24176 when it detects a high current condition in the ether solenoid driver output. One version of the diagnostic text also requires that no 0168 diagnostic codes are active at the same time. If there is an active engine shutdown condition elsewhere on the engine, the ether injection system is disabled regardless of this code. For the ether system to even be enabled and available in the first place (separate from the fault itself), ether injection must be turned on in the ECM parameters or electronic service tool, engine coolant temperature must be less than the calibrated Start Aid Selection Temperature - Coolant, intake manifold air temperature must be less than the calibrated Start Aid Selection Temperature - IMAT, coolant and intake manifold air temperature must be within 11 °C of each other, and in one description set, intake manifold air temperature or coolant temperature must be below 0 °C (32 °F) with engine speed above 0 rpm and no more than 50 rpm below low idle speed.
Common causes of 24176
- Damaged connectors or wiring in the ether solenoid circuit, including chafed insulation, pinched wires, or corrosion at the connector pins
- A general problem within the wiring harness itself, separate from the connectors, such as an internal short to ground or to another circuit
- A faulty ether control solenoid, including an internally shorted coil
- A faulty ECM, listed as a possible cause when the short is not found in the wiring or solenoid
- Harness damage from corrosion, abrasion, or pinch points along the routing between the ECM and the solenoid
How to troubleshoot CAT Engine 24176: first checks
- Inspect the ether solenoid connector and ECM connector pins for corrosion, moisture intrusion, or bent/pushed-back pins
- Visually trace the harness between the ECM and the ether solenoid looking for chafe points, pinches, or abrasion, especially anywhere it crosses brackets, hoses, or moving parts
- Check the wiring for a short to ground using standard resistance/continuity testing with the harness disconnected from the ECM and solenoid
- Test the ether solenoid coil resistance to determine whether the solenoid itself is shorted internally
- Confirm whether any 0168 diagnostic code is also active, since one version of this fault requires that code to be inactive for 24176 to log
- Verify ether injection enable settings and the coolant/intake manifold air temperature sensor codes are not also active, since sensor faults on those circuits block ether system operation
How the code clears
No separate clearing step is listed beyond repairing the underlying short circuit or connector/harness/solenoid fault. Once the high current condition is resolved and the code is no longer active, the ether injection system should re-enable itself when the qualifying temperature and speed conditions are met. If the code was logged but is not currently active, it should clear from the ECM history through the normal logged-code aging process on the electronic service tool.
Affected models and serial ranges
24176 appears in our records across 7 CAT Engine models. Match your machine by model and serial number.
| Model | Serial ranges |
|---|---|
| C11 | Serial range not listed in source records |
| C13 | Serial range not listed in source records |
| C15 | Serial range not listed in source records |
| C175 | Serial range not listed in source records |
| C18 | Serial range not listed in source records |
| C27 | Serial range not listed in source records |
| C32 | Serial range not listed in source records |
Frequently asked questions
What does CAT code 24176 mean?
It means the ECM has detected a high current condition, most likely a short circuit, in the wiring or solenoid that controls the ether injection cold-start system. The ECM logs the fault and disables ether injection until it is fixed.
Can I still start and drive the machine with code 24176 active?
Yes. Ether injection is only a cold-weather starting aid. The engine itself is not shut down by this code unless there is a separate active engine shutdown condition from another fault.
Why won't my ether injection work in cold weather?
If 24176 is active, the ECM has disabled the ether injection system because it detected a short circuit condition in the solenoid driver circuit. Until the wiring, connector, or solenoid problem is repaired, the system will not fire ether even if temperatures call for it.
What usually causes this fault?
Damaged connectors or wiring, corrosion or abrasion in the harness, a faulty ether control solenoid with a shorted coil, or in some cases a faulty ECM if no wiring or solenoid fault is found.
Is this the same as an ether solenoid that's stuck open or not firing at all?
No. This specific code is about high current, a short circuit condition, not a mechanical stuck valve. A solenoid that won't fire due to low current or an open circuit would set a different fault.
Does this code affect engine coolant or intake manifold temperature sensors?
Not directly, but the ether system relies on valid coolant and intake manifold air temperature sensor readings to decide when to enable ether injection. If those sensor codes are active, ether injection is blocked separately from 24176.
Do I need a technician to fix code 24176?
Basic checks like inspecting connectors for corrosion and looking for obvious harness damage can be done by an owner-operator, but confirming a short circuit with proper testing equipment and replacing an ECM if needed generally requires a qualified technician.