Throttle Position Sensor (TPS) Guide for 1991-1996 Dodge Caravan
Having trouble with stalling or poor acceleration? Your Throttle Position Sensor might be the culprit.
- A failing TPS causes noticeable driving problems like stalling, hesitation, and surging.
- Replacement is a simple, quick, and affordable DIY job for most owners.
- No recalls were issued for this part, but it is a common failure item due to age.
- For long-term reliability, consider a reputable aftermarket brand like Delphi, Standard Ignition, or NGK.
Is Your Caravan Stalling, Surging, or Running Rough?
A failing Throttle Position Sensor (TPS) can cause a surprising number of drivability problems in the 1991-1996 Dodge Caravan. Because the engine computer relies on the TPS for critical information about acceleration, a bad sensor can send faulty signals. This can make your van feel unpredictable and unsafe. Common complaints include the engine stalling when you come to a stop, sudden surging or bucking during acceleration, a lack of power, and rough or erratic idling. You may also notice the Check Engine Light is on.
Don't Ignore the Signs
While you might be able to drive with a failing TPS, it's not recommended. Symptoms like stalling or sudden hesitation can be dangerous in traffic. A faulty sensor can also lead to very poor fuel economy and potentially damage other engine components over time.
Choosing the Right Aftermarket TPS
For a vehicle like the 1991-1996 Caravan, original Mopar parts can be difficult to find and are often unnecessary for a simple sensor like the TPS. The aftermarket offers a wide range of options that meet or exceed original specifications. Here’s a breakdown of the brands available:
- Premium Brands (Delphi, NGK, Standard Ignition): These brands have a strong reputation for quality and reliability. Delphi is known for building sensors to OE standards. Standard Motor Products (Standard Ignition) is another trusted name that often designs parts specifically for high-mileage vehicles. NGK, famous for spark plugs, also produces high-quality sensors. These are excellent choices for owners who want peace of mind and long-term reliability.
- Quality Aftermarket (Walker Products): Walker has been a supplier of fuel system and engine management parts since 1946 and is committed to meeting or exceeding OEM standards. They are a solid, reliable choice for a replacement TPS.
- Standard/Economy Brands (Global Parts, Motorad, Replacement, True Tech): These brands provide a cost-effective solution. While they may not have the long-standing reputation of the premium brands for electronics, they offer a functional replacement that can get your van back on the road within a budget.
Pro Tip: Before replacing the TPS, it's a good idea to inspect the wiring connector for any corrosion or damage. Sometimes, a poor connection can mimic the symptoms of a failed sensor. Also, cleaning the throttle body can sometimes resolve idling issues.
| Quality Tier | Estimated Price Range |
|---|---|
| Premium (Delphi, NGK, Standard Ignition) | $45 - $82 |
| Standard (Walker, etc.) | $33 - $50 |
Frequently Asked Questions
Can I replace the TPS myself?
Yes, this is a very DIY-friendly job for most home mechanics. The TPS is located on the side of the throttle body and is typically held in place by two T-25 Torx screws. The process involves disconnecting the battery, unplugging the electrical connector, removing the two screws, and swapping the sensor. The entire job usually takes less than 30 minutes.
Are there any recalls for the TPS on this Caravan?
No, a search of the National Highway Traffic Safety Administration (NHTSA) database shows no recalls specifically for the throttle position sensor on the 1991-1996 Dodge Caravan. There were other recalls for this vehicle, but none related to the TPS.
How do I know for sure my TPS is bad?
A mechanic can test the sensor with a multimeter to confirm it's failing. The test involves checking the voltage signal as the throttle is opened and closed. The voltage should increase smoothly. If it jumps, drops out, or doesn't change, the sensor is bad. Common trouble codes associated with a failing TPS include P0120, P0121, P0122, and P0123.
What's the difference between a 1995 and 1996 Caravan TPS?
The 1996 model year marked the beginning of a new generation for the Caravan. While many aftermarket parts catalogs list the same TPS for the 1991-1997 model years, it's always critical to verify the fitment for your specific year and engine size (e.g., 2.5L, 3.0L, 3.3L, 3.8L). Always use a vehicle-specific lookup to ensure you are buying the correct part.
Technical Specifications
OEM Part Numbers: 4746965 4638631 5276012 4379038
3-pin connector, potentiometer type sensor. Operates on a 5-volt reference signal from the powertrain control module.
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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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