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DTC codes / Chrysler codes / P1486

P1486 · ChryslerEvap Leak Monitor Pinched Hose

P1486 on Chrysler vehicles means the engine computer detected a pinched or restricted evaporative emission (EVAP) system hose during its natural vacuum leak monitor test. The computer uses the fuel tank pressure sensor and a vacuum pump to check for leaks, and a pinched hose prevents the expected pressure change from occurring.

SystemPowertrain
Code typeChrysler specific
SeverityLow
Fix difficultyIntermediate
AreaAuxiliary emission controls

Symptoms you may notice

  • Illuminated check engine light (malfunction indicator lamp) on the dashboard
  • Often no symptoms besides the warning light, with normal driveability
  • A faint fuel odor may be present near the rear of the vehicle if the pinched hose is cracked
  • Slightly rough idle or stumble in rare cases if the pinched hose affects purge flow
  • Failed state emissions inspection due to the stored code

Common causes, most likely first

  1. A physically pinched, kinked, or crushed EVAP hose between the fuel tank and the purge solenoid or canister
  2. A hose that has been misrouted during previous service, causing it to bend sharply and restrict flow
  3. A hose that has collapsed internally or softened due to age and fuel vapor exposure
  4. A hose routing clip or retainer that has broken, allowing the hose to contact a hot or moving component and pinch
  5. Debris or a foreign object pressing against the hose in the underbody area
  6. A stuck or sluggish EVAP purge solenoid that masks the hose restriction during the monitor test

How to diagnose and fix it

  1. Use a scan tool to verify P1486 is active and check for any related EVAP codes before starting physical inspection
  2. Visually inspect all EVAP hoses under the hood and along the underbody for kinks, sharp bends, or crushed sections
  3. Perform a smoke test on the EVAP system to confirm the restriction and locate the pinched area without disassembly
  4. Disconnect and gently flex suspect hoses to check for internal collapse or soft spots that indicate replacement is needed
  5. Reroute or replace any pinched hose, ensuring it follows the factory routing and is secured with intact clips
  6. Clear the code and run the EVAP monitor to completion to confirm the repair, using a scan tool to command the monitor
  7. If the hose is intact, test the purge solenoid and fuel tank pressure sensor for proper operation before condemning the computer

Pinched hose often hides in plain sight

  • A pinched hose frequently occurs after fuel pump or fuel tank service when a technician accidentally traps the hose between the tank and the body during reassembly.
  • The EVAP monitor may not run immediately after a repair; Chrysler vehicles often require a specific fuel level and cold soak before the test completes, so a passing code clear does not guarantee the fix.
  • A pinched hose can mimic a large leak code (P0455) or a small leak code (P0456) depending on how severely the hose is restricted, so always check for multiple stored codes.
  • The fuel tank pressure sensor on Chrysler vehicles is sensitive to hose restrictions, but a failing sensor can also set P1486 falsely; compare live pressure readings during the monitor test before replacing parts.
  • Hoses routed near the exhaust or suspension can pinch only when the vehicle is in motion or at a certain ride height, so a static inspection may miss the problem.

Can I keep driving with P1486?

It is safe to continue driving with P1486 because the fault affects only the evaporative emission system and does not impact engine performance or safety. Avoid topping off the fuel tank past the automatic shutoff, as this can worsen the restriction and may cause fuel smell.

Tools that help

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

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage