DTC 132 — Accelerator Pedal Position Signal Out of Range – High — International DT466E

Diagnostic guide for International DT466E (1996–2003) Navistar three-digit code 132.

Updated October 15, 2026

What it means

Accelerator pedal position (APS) signal voltage is above its valid range. On the DT466E this typically indicates a pedal sensor or wiring fault and the engine may only idle.¹

Most likely causes

1. Accelerator pedal position sensor internal failure causing high voltage output — The APS potentiometer can wear or fail, producing a signal above the ECM’s valid range.¹
2. Signal circuit shorted to voltage or reference voltage shorted to signal — Chafed or pinched wiring in the pedal harness can pull the APS signal line high.¹
3. Corrosion or poor connection at the pedal sensor connector raising signal voltage — Moisture or terminal fretting at the APS connector can bias the signal high.¹
4. Idle validation switch (IVS) disagreement with APS due to pedal assembly wear — A worn pedal assembly can cause the IVS and APS to disagree, contributing to out-of-range readings.¹
5. ECM reference voltage supply fault affecting APS reading — An abnormal 5 V reference to the pedal sensor can make the APS appear high.¹

How to diagnose

1. Verify the code with a Navistar-compatible scan tool or flash code read; confirm DTC 132 is present and active.
2. Inspect the accelerator pedal assembly and wiring for chafing, pinching, or heat damage; repair any damaged harness.
3. Disconnect the APS connector and inspect terminals for corrosion, moisture, or bent pins; clean or replace as needed.
4. With key on, engine off, measure APS reference voltage and signal voltage at the sensor connector; compare to service specifications and look for signal voltage above valid range.
5. Check continuity and isolation of the APS signal wire to ground and to battery voltage; repair any short to voltage.
6. Perform a pedal sweep test while monitoring APS voltage with a scan tool; voltage should change smoothly and stay within range.
7. If voltage remains high with sensor disconnected, suspect wiring short to voltage or ECM reference issue; isolate harness sections to locate fault.
8. If wiring tests normal, replace the accelerator pedal position sensor/assembly and retest for code clearance.

Parts and tools you may need

• Navistar-compatible scan tool for flash codes
• Digital multimeter
• Terminal cleaning tools
• Replacement accelerator pedal position sensor/assembly

Tools you’ll need

• Navistar-compatible scan tool — Reads and confirms active DTC 132 and monitors APS voltage during a pedal sweep to verify out-of-range signal.
• digital multimeter — Measures key-on reference and signal voltages at the APS connector and checks signal wire for shorts to voltage or ground.
• terminal release tool set — Allows safe inspection and cleaning of the APS connector terminals for corrosion or bent pins without damage.
• inspection mirror and LED flashlight — Reveals chafing, pinching, or heat damage to the pedal assembly harness in tight under-dash areas.

Rough cost and difficulty

Typical US independent-shop figures; labor runs about $140–$200 per hour (dealers charge more). Confirm the diagnosis before buying parts.

When to see a pro

If the code returns after sensor and wiring repair, or if ECM reference voltage is abnormal, have the ECM and harness evaluated by a qualified diesel technician. Do not attempt high-pressure oil or injector repairs for this pedal code.

Check for recalls

Recalls are tied to your truck’s VIN, so check yours directly: enter the VIN at NHTSA’s recall lookup. Open safety recalls are repaired free at a dealer.

Sources