Damaged, chafed or corroded wiring to the hydraulic fan solenoid (open circuit or short to earth or voltage); Poor connection or corroded terminals at the solenoid connector; Failed hydraulic cooling fan solenoid with open or shorted coil; Fault in the fan control circuit supply, such as a blown fuse or faulty relay where fitted; Low or contaminated power steering or fan drive fluid affecting the hydraulic system, where it shares the supply (model dependent); Fault inside the engine control unit driver circuit.

P1499

Open Or Shorted Condition Detected In The Hydraulic Cooling Fan Solenoid Control.

Dodge
Powertrain
Manufacturer code
Medium severity

How this code is built

P: SystemPowertrain
1: Defined byThe manufacturer
4: AreaAuxiliary emission controls
99: FaultThe specific fault in that area

What it means

P1499 on a Dodge means the engine control unit has detected an open circuit or a short in the control circuit for the hydraulic cooling fan solenoid. The fan speed is controlled by this solenoid, and the control unit saw a fault in its drive circuit rather than a fault in the fan's actual performance. Which vehicles use a hydraulic fan depends on the model and engine, so confirm the fitment before diagnosing.

Symptoms

Engine cooling fan running constantly at full speed or not running at all
Engine temperature rising in traffic or when idling
Air conditioning performing poorly at idle
Engine warning light on
Loud fan noise or reduced power from the fan drive
Coolant temperature gauge reading higher than normal

Possible causes

Damaged, chafed or corroded wiring to the hydraulic fan solenoid (open circuit or short to earth or voltage)likely
Poor connection or corroded terminals at the solenoid connectorlikely
Failed hydraulic cooling fan solenoid with open or shorted coillikely
Fault in the fan control circuit supply, such as a blown fuse or faulty relay where fittedpossible
Low or contaminated power steering or fan drive fluid affecting the hydraulic system, where it shares the supply (model dependent)rare
Fault inside the engine control unit driver circuitrare

How to diagnose

Read the stored codes and freeze frame data, noting engine temperature and speed when the fault set, and check for other codes
Visually inspect the fan solenoid wiring and connector for chafing, heat damage, corrosion or water ingress
Check the relevant fuses and relay (where fitted) using the wiring diagram for the specific model and engine
Check the fluid level and condition in the hydraulic fan or power steering system, as specified for the vehicle
Measure the solenoid coil resistance and compare it with the manufacturer's specification
With the connector unplugged, check the harness for continuity, short to earth and short to voltage back to the control unit
Command the fan solenoid with a diagnostic scan tool, if supported, and watch for fan response and circuit changes
Check the supply and control signals at the connector, and only suspect the control unit once the wiring and solenoid are proven good

How to fix

Repair or replace damaged wiring and renew any corroded or damaged connector terminals
Replace the hydraulic cooling fan solenoid if its resistance is out of specification or it fails operational tests
Replace blown fuses or faulty relays after finding out why they failed
Correct the fluid level or condition in the hydraulic system, following the manufacturer's procedure
Repair or replace the engine control unit only if a driver fault is confirmed, with any programming it needs

Can I keep driving?

Medium severity

Short, gentle journeys may be possible, but the fan may not cool the engine properly, so watch the temperature gauge closely and stop if it climbs. Get it fixed soon to avoid overheating and engine damage.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.