DTC 332 — Injection Control Pressure Above Spec With Engine Off — International DT466E
DTC 332 on International DT466E (1996–2003) indicates the ICP sensor reports pressure when the engine is off. The code is a Navistar three-digit flash code…
What it means
The ECM sees injection control pressure above specification with the engine off. The generic definition is that the ICP sensor reads pressure with the engine off when it should read near zero. Typical on this platform is a failed ICP sensor or an ICP circuit fault.1
Most likely causes
- Failed ICP sensor — The ICP sensor is reading high or stuck high, causing the ECM to see pressure with the engine off. Typical on this platform is a failed ICP sensor.1
- ICP signal circuit fault — A wiring or connector issue on the ICP signal circuit can bias the sensor voltage high. Typical on this platform is an ICP circuit fault.1
How to diagnose
- Verify the code is present and read any related codes with a scan tool or flash code count. DTC 332 is a Navistar three-digit code read by amber engine lamp flashes or scan tool.
- Key on, engine off. Check ICP sensor voltage and compare to expected zero-pressure baseline; an elevated reading points to sensor or circuit fault. The generic definition is ICP sensor reads pressure with engine off when it should read near zero.
- Inspect the ICP sensor connector for oil intrusion, corrosion, or damaged pins. Oil in the connector or wiring faults are typical ICP sensor/circuit issues on HEUI systems.
- Disconnect the ICP sensor and recheck the signal. If the ECM still sees high pressure with sensor unplugged, suspect a short to voltage in the signal wiring. ICP signal out of range high is usually a failed ICP sensor or signal circuit shorted to voltage.
- If the signal returns to normal with sensor disconnected, replace the ICP sensor and retest.
Parts and tools you may need
- Digital multimeter
- Scan tool capable of Navistar three-digit codes
- Basic hand tools for sensor access
Tools you’ll need
- OBD-II scan tool — Reads DTC 332 and related codes and provides live ICP sensor voltage with key on engine off to confirm high pressure reading.
- digital multimeter — Measures ICP sensor signal voltage at key on engine off against the zero-pressure baseline to detect an elevated reading.
- inspection mirror — Allows visual check of the ICP sensor connector and wiring for oil intrusion, corrosion, or damaged pins in tight engine locations.
- electrical contact cleaner — Cleans oil-contaminated or corroded ICP sensor connector contacts before retesting the signal circuit.
Rough cost and difficulty
| Likely repair | Parts | Shop labor | Who usually does it |
|---|---|---|---|
| Wiring or connector repair | $10–$100 | 1–4 hrs | DIY with tools and a manual |
| ICP (injection control pressure) sensor | $60–$200 | 0.5–1.5 hrs | DIY with tools and a manual |
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 replacement, have the harness and ECM inputs tested by a qualified diesel technician. Do not attempt high-pressure oil system disassembly for this code; DTC 332 is an electrical/sensor fault with engine off.
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
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