CPP 3970085 ACCELERATOR PEDAL POSITION SENSOR (APPS) FOR 98.5–03 CUMMINS 5.9L 24V

Direct-Replacement APPS for 1998.5–2003 Cummins 5.9L 24V

The CPP 3970085 Accelerator Pedal Position Sensor (APPS) restores precise throttle input on 1998.5–2003 Dodge Ram trucks equipped with the 5.9L 24-valve Cummins. If you’re experiencing dead pedal, erratic throttle response, or intermittent surging, a worn APPS is a common culprit. This unit is a high-quality, direct-fit replacement designed for OE-style performance and reliability.

Key Features

• OE-style replacement for part number 3970085
• Accurate throttle signal for smooth, consistent pedal response
• Direct fit—no splicing or guesswork
• Built for durability in diesel truck environments
• Backed by the CPP Diesel team

Fitment

Vehicle: Dodge Ram 2500/3500

• Engine: 5.9L Cummins 24-Valve
• Model Years: 1998.5, 1999, 2000, 2001, 2002, 2003
• Fuel System: VP44-equipped trucks
• Position: Accelerator Pedal Position Sensor (APPS)

What’s Included

• (1) Accelerator Pedal Position Sensor (APPS), p/n 3970085
• Basic install guidance

Installation Notes

• Disconnect battery ground before service.
• Verify connector style and pedal bracket compatibility prior to install.
• After installation, cycle the key to ON (engine off) and depress/release the pedal several times to ensure smooth signal sweep.
• Clear any stored throttle-related DTCs if present.

Specifications

Troubleshooting Symptoms This Part Can Fix

• “Dead pedal” or delayed throttle response
• Surging or inconsistent acceleration
• Intermittent throttle signal faults/DTCs

Cross-Reference / Alternatives

Direct replacement for 3970085 (APPS). Use this sensor when the original throttle position input fails or signal is erratic.

Why Buy From CPP Diesel

• Diesel specialists who know Cummins platforms inside and out
• Fast shipping and knowledgeable support
• Carefully curated parts that fit and perform

FAQ

Common signs include dead pedal, surging at steady throttle, or throttle-related fault codes. If wiring and connectors are intact, a failing APPS is likely.

Most trucks will learn the new sensor automatically. After install, cycle the key ON (engine off) and operate the pedal through its full range several times. Clear any related DTCs.

Only the 1998.5 (late-1998) through 2003 VP44-equipped 24-valve trucks. It does not fit early 1998 12-valve applications.

No. This is a direct-fit replacement. Inspect the connector for corrosion and ensure a positive lock when plugging in.