Faulty purge control valve or its electrical connector on circuit 2; Damaged or disconnected vacuum hose between the purge valve and intake manifold; Failed vent solenoid or its wiring in the evaporative canister assembly; Leaking or cracked fuel tank pressure sensor or its seal; Corroded or chafed wiring in the ELC circuit 2 harness; Sticking or contaminated evaporative canister; Loose or faulty fuel cap that prevents the system from sealing during the test

DTC codes / Jaguar codes / P1448

P1448 · JaguarELC System 2

Q: What does code P1448 mean?

ELC System 2. P1448 on a Jaguar indicates that the Evaporative Loss Control (ELC) system, specifically circuit 2, has failed a functional check performed by the engine control module. The computer monitors the purge and vent control circuits for expected electrical and vacuum responses, and it sets this code when the secondary circuit does not behave as commanded during the self-test.

P1448 on a Jaguar indicates that the Evaporative Loss Control (ELC) system, specifically circuit 2, has failed a functional check performed by the engine control module. The computer monitors the purge and vent control circuits for expected electrical and vacuum responses, and it sets this code when the secondary circuit does not behave as commanded during the self-test.

SystemPowertrain

Code typeJaguar specific

SeverityLow

Fix difficultyIntermediate

AreaAuxiliary emission controls

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
A faint fuel odor around the vehicle after refueling or when parked
Slight rough idle or hesitation if the purge valve is stuck open
Increased fuel consumption in some cases due to incorrect vapor flow
Failed emissions test because the evaporative system monitor is incomplete
In rare cases, a hissing or clicking noise from the engine bay or near the fuel tank

Common causes, most likely first

Faulty purge control valve or its electrical connector on circuit 2
Damaged or disconnected vacuum hose between the purge valve and intake manifold
Failed vent solenoid or its wiring in the evaporative canister assembly
Leaking or cracked fuel tank pressure sensor or its seal
Corroded or chafed wiring in the ELC circuit 2 harness
Sticking or contaminated evaporative canister
Loose or faulty fuel cap that prevents the system from sealing during the test

How to diagnose and fix it

Inspect the fuel cap for proper sealing and tighten it until it clicks; replace if the gasket is worn
Check all visible vacuum hoses in the ELC system for cracks, disconnections, or collapse
Test the purge control valve for resistance and proper operation using a scan tool bidirectional control
Verify power and ground at the vent solenoid connector and inspect for corrosion or damaged pins
Perform a smoke test on the evaporative system to locate any leaks
Check the wiring harness for circuit 2 for continuity, shorts to ground, or shorts to power
If all electrical and vacuum checks pass, replace the evaporative canister assembly or the specific faulty component

What Jaguar Technicians Check First for P1448

A loose or aftermarket fuel cap is the most common cause of ELC system codes on Jaguars, so always verify the cap seals correctly before testing circuits.
The ELC system 2 circuit often shares a ground with other sensors, so a poor ground can set P1448 without any fault in the purge or vent components themselves.
Jaguar's evaporative monitor runs only under specific conditions (fuel level between 15% and 85%, engine off for a set time), so the code may not reset immediately after a repair until those conditions are met.
A stuck-open purge valve can cause a lean condition at idle and set mixture-related codes alongside P1448, so always check fuel trims when diagnosing.
Do not overlook the fuel tank pressure sensor; its signal is used by the ELC monitor, and a skewed reading can trigger P1448 even when the mechanical system is intact.

Can I keep driving with P1448?

You can continue driving with P1448 because it does not affect engine safety or performance in most cases, but avoid topping off the fuel tank and have the system inspected soon to prevent a small evaporative leak from worsening.

Tools that help

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Guidance is general and written for Jaguar vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.