P1494Manufacturer-specific code

P1494 Code: Leak Detection Pump Switch or Mechanical Fault (Chrysler)

On Chrysler, Dodge, Jeep and Ram vehicles, the P1494 code means the leak detection pump has a switch or mechanical fault. It usually causes no noticeable symptoms. Other brands may define this number differently.

Severity
Low
Can I keep driving?
Yes, no immediate risk
Estimated cost
$60 to $250
Difficulty
Easy
System
Emissions Control
Applies to
Depends on the manufacturer

Common in: Dodge, Jeep

Updated Reviewed by Renzo Chacca

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What the P1494 code means

P1494 is a manufacturer-specific code: the 1 in the second position means each automaker defines what it means, not the generic SAE standard. The most widespread definition is the one used by Chrysler, Dodge, Jeep and Ram. If your vehicle is another brand, confirm the code text with a scan tool that supports that manufacturer.

ManufacturerMeaning of P1494
Chrysler, Dodge, Jeep and RamLeak detection pump switch or mechanical fault

Chrysler tests the EVAP system with a leak detection pump (LDP) that pressurizes the system. A switch inside the pump reports every pumping cycle.

The computer sets the P1494 code when the pump switch does not change the way it expects: the pump is stuck, the diaphragm is torn or water got in.

Before you start repairs, confirm the make, model, year and engine. With manufacturer codes, the same number can change even between engines from the same brand.

P1494 code symptoms

  • Check engine light on.
  • Usually no symptoms at all.

Likely causes of the P1494 code

  1. LDP with water or dirt inside. Measure its real flow or pressure.
  2. Torn diaphragm. Confirm it with the tests in the diagnosis section.
  3. Clogged pump filter. Measure its real flow or pressure.
  4. Pump vacuum hose. Check for cracks and clamps, especially in the hot areas.

How to diagnose the P1494 code step by step

  1. Inspect the pump next to the canister.
  2. Check its vacuum hose for cracks and loose connections.
  3. Command the pump with the scan tool and watch whether it cycles.

How to fix the P1494 code

  • Replace the LDP.
  • Repair the hose.

Technical reference data

  • The pump uses engine vacuum to pump air into the tank.
  • P1xxx codes are manufacturer-specific: confirm the definition with a scan tool that supports your brand.
  • Reference values: check the manufacturer data for your vehicle.

Brand-specific notes

The pump sits low and exposed, so water and dirt are the usual enemies. A look under the vehicle is the first step.

P1494 on Chrysler

Common on the Dodge, Chrysler, Jeep and Ram.

If your vehicle is another brand, check the table above for the meaning its manufacturer gives this code and confirm it with a compatible scan tool.

Frequently asked questions about P1494

What does the P1494 code mean on a Chrysler?
It means the leak detection pump has a switch or mechanical fault. It usually causes no symptoms.
Does P1494 mean the same thing on every brand?
No. It is a manufacturer-specific code, so on other brands it may not exist or may mean something different. Confirm it with a scan tool that supports your make.
Can I drive with a P1494 code?
Yes. A P1494 code does not affect how the vehicle drives. The EVAP system just cannot complete its self-test until it is repaired.
How much does it cost to fix P1494?
Roughly $60 to $250 on a Chrysler. Most of that is the leak detection pump itself.
Will a P1494 code clear itself?
Not while the pump is stuck, torn or full of water. After a repair, clear the code and drive normally so the system can retest itself.
What is the most common cause of P1494?
Water or dirt inside the pump, or a torn diaphragm. A clogged filter and a damaged vacuum hose come next.

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Questions about the P1494 code

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