Dodge Nitro 2007-2011 Evaporative Emissions Leak Detection Pump Guide
Seeing a check engine light for an EVAP leak on your Dodge Nitro? This part is a common cause.
- The most common sign of failure is a check engine light with codes P0455, P0456, or P0457.
- This part is located in the rear driver's side wheel well and is easy to replace yourself in under an hour.
- Before replacing the pump, check that your gas cap is tight and the seal is in good condition, as this is a frequent cause of the same codes.
- Quality aftermarket brands like Dorman and Standard Ignition are reliable, cost-effective alternatives to the more expensive OEM part.
Is Your Dodge Nitro's Check Engine Light On?
A glowing check engine light is the most common sign of a problem with the evaporative emissions system. If you use a code scanner and see codes like P0456 (small leak), P0455 (large leak), or P0457 (gross leak/gas cap), a failing leak detection pump is a likely suspect. You might also see a "GAS CAP" message on your dashboard. While the vehicle is usually safe to drive, it will not pass an emissions inspection until the issue is fixed.
Choosing the Right Aftermarket Pump
When replacing the leak detection pump on your 2007-2011 Nitro, you don't have to buy an expensive OEM part from the dealer. Aftermarket brands offer a reliable and affordable alternative. For this specific part, the primary aftermarket options are Dorman and Standard Ignition (SMP).
- Dorman: A well-known brand that produces a wide range of aftermarket parts. Their parts are designed to match the fit and function of the original and are a common choice for DIY repairs.
- Standard Ignition (Standard Motor Products): A long-standing, reputable manufacturer known for quality electronic and engine management components. They are a trusted brand among professional mechanics.
Pro-Tip: For a straightforward component like the leak detection pump, both Dorman and Standard Ignition offer dependable quality that meets or exceeds the original's performance for a fraction of the price. Since the installation is simple, choosing a quality aftermarket part can save you significant money on both the part and labor.
Cost at a Glance: 2007-2011 Dodge Nitro Leak Detection Pump
| Part Type | Estimated Price Range |
|---|---|
| New Aftermarket (Dorman, Standard) | $38.91 - $42.69 |
| New OEM (Mopar) | $70 - $110 |
| Shop Labor | $50 - $150 |
Known Issues for This Vehicle
While my searches found no specific recalls or Technical Service Bulletins (TSBs) for the leak detection pump on the 2007-2011 Dodge Nitro, EVAP system leaks are a common issue for many Dodge vehicles. Before replacing the pump, it's wise to check two other common culprits:
- The Gas Cap: A worn-out gas cap seal is a very frequent cause of EVAP codes. Always make sure it's tightened correctly. If it's old, replacing it is a cheap first step.
- EVAP Hoses: Check the rubber and plastic hoses connected to the charcoal canister and purge valve for any visible cracks or damage.
Frequently Asked Questions (FAQ)
Where is the leak detection pump located on a 2007-2011 Dodge Nitro?
The pump is attached directly to the charcoal canister, which is located in the rear driver's side wheel well area, under the vehicle.
Can I replace this part myself?
Yes, this is a very DIY-friendly repair. It typically involves removing an electrical connector and a hose, then giving the pump a quarter-turn to release it from the canister. The entire job can usually be done in under an hour with basic tools.
What's the difference between a P0456 and P0455 code?
Both codes indicate a leak in the EVAP system. A P0456 code means a "small leak" has been detected, while a P0455 code means a "large leak" has been detected. A loose gas cap can trigger a large leak code, while a small crack in a hose or a failing pump might trigger the small leak code.
Do I need a smoke test before replacing the pump?
A smoke test is the most accurate way to find a leak, but it's not always necessary. Because the leak detection pump is a common failure point and is relatively inexpensive, many owners choose to replace the pump and gas cap first. If the light comes back on, a smoke test is the recommended next step to avoid guessing and replacing more parts than needed.
Technical Specifications
OEM Part Numbers: 4891685AB 4861962AD 4861962AC 4861962AB 4861962AA 4891685AA
This part is also known as an Evaporative System Integrity Module (ESIM). It attaches directly to the charcoal canister with a twist-lock mechanism and has one electrical connector and one hose port.
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.
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