Ram ProMaster City EVAP Leak Detection Pump: A 2015-2017 Guide
Getting a 'Check Gas Cap' message or EVAP code on your 2015-2017 Ram ProMaster City? The leak detection pump is a likely suspect.
- A faulty leak detection pump is a very common cause of EVAP codes (like P0456) and 'Check Gas Cap' warnings on the 2015-2017 ProMaster City.
- Replacement is extremely simple (a 1 out of 5 difficulty) and can be done in minutes with no special tools.
- Aftermarket brands like Dorman and Standard Ignition offer a cost-effective and reliable alternative to the more expensive OEM Mopar part for this specific component.
- Always use the new seal/gasket that comes with the replacement pump to prevent creating a new leak.
Is Your ProMaster City Showing an EVAP Code?
If your 2015, 2016, or 2017 Ram ProMaster City has the check engine light on with codes like P0456 (small leak detected), or a persistent 'check gas cap' warning even after tightening or replacing the cap, the EVAP leak detection pump is a common culprit. This part is responsible for verifying the integrity of your fuel vapor system. When it fails, it can incorrectly report a leak, leading to a failed emissions test and an annoying light on your dash.
Don't Ignore the Light
While a bad leak detection pump won't stop your van from running, it will cause it to fail an emissions inspection. It's best to address the issue to ensure your vehicle is compliant and to turn off the check engine light.
Common Failure Symptoms
The main job of this pump is to report problems, so its failure symptoms are all related to warning lights and diagnostic trouble codes (DTCs). You likely won't notice any difference in how your van drives.
- Check Engine Light: This is the most common symptom, usually accompanied by an EVAP-related code.
- "Check Gas Cap" Message: The system may interpret the faulty pump signal as a loose gas cap.
- EVAP Trouble Codes: Codes such as P0456 (small leak), P0455 (large leak), or P0457 (leak detected - fuel cap) are strong indicators.
Choosing the Right Aftermarket Part
For the 2015-2017 ProMaster City, you have a few options when it comes to replacing the leak detection pump. The original Mopar part is available, but quality aftermarket alternatives from brands like Dorman and Standard Ignition offer significant savings.
OEM vs. Aftermarket
Mopar (OEM): The original equipment manufacturer part is a guaranteed fit and is the same component your van was built with. However, it comes at a higher price point. Given that the original part can fail, upgrading isn't necessarily a bad idea.
Dorman / Standard Ignition (Aftermarket): Both Dorman and Standard Ignition are well-known aftermarket brands that produce direct-fit replacement parts. For a simple, non-mechanical part like the leak detection pump, these brands offer a reliable and cost-effective solution. Often, the failure is internal to the electronics or the simple mechanism, 🎬 See a teardown of how these pumps fail internally. and these aftermarket options are designed to meet or exceed the original function. Given the significant cost savings, an aftermarket pump is a smart choice for most owners.
Pro Tip: Check the Seal
The new pump will come with a new rubber O-ring or gasket. Always use the new seal to ensure a proper, leak-free installation. An old or damaged seal can cause the very leaks the system is designed to detect.
Cost to Replace ProMaster City Leak Detection Pump (2015-2017)
| Part Type | Estimated Part Cost |
|---|---|
| New Aftermarket (Dorman, Standard Ignition) | $38.91 - $42.69 |
| New OEM (Mopar) | $71.00 - $107.00 |
| Shop Labor | $50 - $100 |
*Prices are estimates and may vary based on supplier and location.
Frequently Asked Questions
Is it hard to replace the leak detection pump on a ProMaster City?
No, it is a very easy job. The pump is located on the charcoal canister, which is typically near the fuel tank. It requires no special tools; you simply disconnect one electrical connector, one hose, and then twist the pump to remove it. The new one twists back into place. The entire process can take as little as 15 minutes.
🎬 Watch: Step-by-step guide to replacing the pump and clearing codes.Where is the leak detection pump located on the 2015-2017 Ram ProMaster City?
The leak detection pump is mounted directly onto the EVAP charcoal canister. You will need to look underneath the vehicle, near the fuel tank area, to access it. It is a small, round, plastic component with an electrical connector.
Will replacing the leak detection pump fix my P0456 code?
It is a very common fix for this code on the ProMaster City, especially if you have already checked that the gas cap is tight and in good condition. A diagnostic test (smoke test) is the only way to be 100% certain, but if no leaks are found, the pump itself is the next logical point of failure.
🎬 Watch: How to professionally diagnose EVAP system leaks.Are there any recalls for this part?
As of early 2026, there are no specific recalls or widespread Technical Service Bulletins (TSBs) for the EVAP leak detection pump on the 2015-2017 Ram ProMaster City. The issues appear to be standard wear-and-tear failures rather than a manufacturing defect affecting all vehicles.
Helpful Videos
Technical Specifications
OEM Part Numbers: 04861959AD 4861959AC 4861959AB 4861959AA
This component is also known as an Evaporative System Integrity Module (ESIM). It is a non-mechanical pump that uses a gravity-based switch and system pressure to detect leaks. It mounts directly to the charcoal canister with a twist-lock fitting.
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.
- Ram ProMaster City:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your ProMaster City Showing an EVAP Code?
- Don't Ignore the Light
- Common Failure Symptoms
- Choosing the Right Aftermarket Part
- OEM vs. Aftermarket
- Pro Tip: Check the Seal
- Cost to Replace ProMaster City Leak Detection Pump (2015-2017)
- Frequently Asked Questions
- 🎟️ Get 5% Off