Faulty high-speed fan relay (sticking, burnt contacts or failed coil); Corroded, loose or damaged relay socket or connector terminals; Open circuit or short in the relay control wiring between the engine control module and the relay; Blown fuse or poor power or earth supply to the relay or fan circuit; Faulty cooling fan motor or fan control module drawing abnormal current (model dependent); Fault in the engine control module relay driver.

P1476

Fan Relay High Circuit.

Jaguar
Powertrain
Manufacturer code
Medium severity

How this code is built

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

What it means

On a Jaguar, P1476 means the engine control module has detected a fault in the high-speed cooling fan relay circuit. It saw a voltage or current state on the relay control or supply side that did not match the command it was giving, such as an open circuit, a short or a relay that did not respond. The exact fan layout and relay location depend on the model and engine.

Symptoms

Engine management warning light on
Engine running hotter than normal or temperature gauge climbing in traffic
Cooling fans not running at high speed, or running constantly
Air conditioning performing poorly when stationary
Possible reduced engine performance or limp mode if overheating develops

Possible causes

Faulty high-speed fan relay (sticking, burnt contacts or failed coil)likely
Corroded, loose or damaged relay socket or connector terminalslikely
Open circuit or short in the relay control wiring between the engine control module and the relaypossible
Blown fuse or poor power or earth supply to the relay or fan circuitpossible
Faulty cooling fan motor or fan control module drawing abnormal current (model dependent)possible
Fault in the engine control module relay driverrare

How to diagnose

Read all stored and pending codes and freeze frame data, noting coolant temperature and whether the air conditioning was on when the fault set
Check the engine coolant level and look for obvious fan blockage or damage
Inspect the relevant fuses, relay socket and connectors for corrosion, heat damage, water ingress and loose terminals
Command the fans on with a diagnostic scan tool, if supported, and listen for the relay clicking and fan operation at high speed
Check the relay for correct operation and compare it with a known good identical unit, or test its coil and contacts on the bench
Measure the supply voltage and earth at the relay socket with the circuit active, using the wiring diagram for the specific model
Test the control wire between the engine control module and relay for continuity, short to earth and short to voltage
Check the fan motor current draw and the fan control module if fitted, following model-specific procedures

How to fix

Replace the faulty fan relay with a correct specification part
Clean or repair the relay socket and connector terminals, replacing damaged ones
Repair or replace damaged wiring in the relay control, power or earth circuits
Replace the blown fuse only after finding and correcting the cause of the overload
Replace the faulty fan motor or fan control module if testing shows it is at fault
Replace or repair the engine control module only after all wiring and components are proven good

Can I keep driving?

Medium severity

Short, careful trips are possible if the temperature stays normal, but fix it soon because loss of high-speed cooling can lead to overheating and engine damage. Stop and let the engine cool if the temperature gauge rises or a warning appears.

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