Jeep Compass (2007-2022) Evaporative Emissions Leak Detection Pump Replacement Guide
A check engine light from an EVAP code on your Jeep Compass often points to this simple part.
- The main symptom of a bad pump is a check engine light with code P0456 or P0455.
- This is an easy DIY repair that usually takes less than 30 minutes with basic tools.
- Aftermarket brands like Dorman and Standard Ignition are affordable and reliable fixes for this issue.
- A bad leak detection pump will not affect how your Jeep drives but will cause it to fail an emissions test.
Is Your Check Engine Light On?
The most common reason you'll need to replace the EVAP leak detection pump is an illuminated check engine light. Your Jeep's computer stores codes that a mechanic or an OBD-II scanner can read. For this issue, you will likely see codes such as P0456 (small leak) or P0455 (large leak). 🎬 See how to fix these specific codes by replacing the ESIM. You might also see a "Check Gas Cap" message on your dashboard, even if the cap is tight.
Common Failure Symptoms
A bad leak detection pump usually doesn't affect how your Jeep drives. The main problem is that you won't be able to pass an emissions test. Here are the main signs of a problem:
- Check engine light is on
- "Check Gas Cap" dashboard message
- Failure to pass a state emissions inspection
- Diagnostic codes like P0456, P0455, P043E, or P043F
Choosing the Right Aftermarket Part
For the 2007-2022 Jeep Compass, the original equipment (OEM) leak detection pump is a common failure item. Aftermarket brands offer a reliable and much more affordable solution. The two main aftermarket brands you will find are Dorman and Standard Ignition (Standard Motor Products).
- Dorman: This is a very popular choice for Jeep owners. It is known for being a direct-fit replacement that solves the common EVAP codes. Many DIY repair videos and forum posts show owners successfully using this brand.
- Standard Ignition (SMP): This is another trusted name in aftermarket parts. They produce quality components that meet or exceed OEM specifications and are a solid choice for this repair.
Pro Tip: Since both Dorman and Standard Ignition are reputable, choosing based on price and availability is a safe bet. Both are considered reliable fixes for this specific problem.
Check for TSBs First
Jeep has released Technical Service Bulletins (TSBs) for some model years related to the P0456 code. These bulletins sometimes suggest a software update for the vehicle's computer could fix a false code. However, a failed pump is still the most frequent cause. If you've already tried a new gas cap, the leak detection pump is the next logical part to replace.
Cost of Replacing the Leak Detection Pump
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Dorman, Standard) | $49 - $58 |
| New OEM (Mopar) | $75 - $110 |
| Shop Labor | $100 - $180 |
Frequently Asked Questions
Where is the leak detection pump on my Jeep Compass?
The pump is located on the charcoal canister. You can find it near the rear of the vehicle, usually behind the driver's side rear wheel. It's a small, round part, often white and black, that twists into the canister.
Can I replace this part myself?
Yes, this is a great DIY job for beginners. It typically requires no special tools. You just need to disconnect the electrical plug, give the old pump a quarter-turn to release it, and then install the new one in its place. It can usually be done in under 30 minutes.
🎬 Watch this step-by-step walkthrough of the pump replacement process.I replaced my gas cap, but the light is still on. Is this the next step?
Yes. A loose or bad gas cap is the first thing to check for an EVAP code. If a new, tight gas cap doesn't make the light go away after a few days of driving, the leak detection pump is the next most likely cause.
🎬 Watch this quick guide on troubleshooting gas cap and EVAP codes.Will a bad leak detection pump make my Jeep stall?
It is very unlikely. A bad leak detection pump should not affect engine performance or drivability. If your Jeep is stalling, especially after filling up with gas, you may have a different problem, like a faulty EVAP purge valve.
Helpful Videos
Technical Specifications
OEM Part Numbers: 4861962AA
The pump is a small, electro-mechanical device that mounts directly to the EVAP charcoal canister. It contains a diaphragm and a switch to monitor system pressure. It is also referred to as an Evaporative System Integrity Monitor (ESIM).
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Jeep Compass: