Diesel Trouble Codes

P2284 — Injector Control Pressure Sensor Circuit Range/Performance — 6.0 Power Stroke

Diagnostic reference for 6.0L Power Stroke HEUI injection control pressure sensor circuit range/performance fault.

Updated October 15, 2026

What it means

P2284 is the generic SAE J2012 definition that the injection control pressure (ICP) sensor signal is outside the range or rate of change the PCM expects for current conditions. On the 6.0L Power Stroke this is the oil-pressure sensor for the HEUI system, not a fuel rail sensor.1

Most likely causes

  1. ICP sensor internal failure or drift causing out-of-range voltage. — Sensor output voltage no longer tracks actual ICP; PCM flags range/performance. Typical on 6.0L for ICP sensor faults.1
  2. Oil intrusion into ICP sensor connector or harness causing biased signal. — Engine oil wicks into the ICP connector and contaminates terminals, altering sensor signal. Oil contamination of the ICP connector is a known failure on 6.0L.1
  3. ICP signal circuit short to voltage or ground, or wiring/connector damage. — Chafed or corroded wiring changes sensor voltage outside valid range. A high ICP sensor signal is usually a failed sensor or signal circuit shorted to voltage; oil intrusion into the ICP connector is a known cause.2
  4. 5 V reference or ground supply issue to ICP sensor. — Low or high reference/ground shifts sensor output. A low ICP sensor signal is usually an open or shorted sensor, oil-soaked connector, or harness fault; check the 5 V reference and signal at the ICP sensor.3

How to diagnose

  1. Verify code and freeze frame; confirm P2284 is present and note engine conditions at set.
  2. Inspect ICP sensor and connector for oil contamination, damaged pins, or corrosion; clean/dry and retest. Oil in the ICP connector is a known cause on 6.0L.
  3. Key-on engine-off: check ICP sensor reference voltage (~5 V) and ground integrity at the sensor connector; compare to spec.
  4. Monitor ICP sensor voltage vs. commanded ICP with a scan tool during crank and idle; look for signal stuck high/low or erratic rate of change. The generic definition is signal outside expected range or rate of change.
  5. If sensor signal is plausible but range/performance persists, compare actual ICP to IPR duty cycle; a sensor reading that does not follow commanded pressure suggests sensor/harness fault rather than true pressure problem. Typical on this platform: compare ICP to commanded pressure and check for high-pressure oil leaks.
  6. Inspect harness routing for chafing, heat damage, or oil saturation along the valve cover and HPOP area; repair wiring as needed.
  7. If electrical checks pass, substitute a known-good ICP sensor and re-evaluate; persistent range/performance with a good sensor points to wiring/PCM. On 6.0L a high ICP sensor signal is usually a failed sensor or signal circuit shorted to voltage.

Specs and test values

CheckNormal readingWhen to measureSource
ICP while cranking, engine warmShould reach 500–600+ psi; IPR at 85% with low ICP points to a high-pressure oil leakCranking, read on a scan toolBulletproof Diesel

Common mistake to avoid

Replacing the ICP sensor or HPOP when the real problem is a high-pressure oil leak. If ICP stays low while the IPR is commanded hard during cranking, look for leaks at the STC fitting, standpipes, dummy plugs and injector seals before buying parts. Source: Bulletproof Diesel — 6.0L high-pressure oil system diagnostic.

Parts and tools you may need

Tools you’ll need

Rough cost and difficulty

Likely repairPartsShop laborWho usually does it
Wiring or connector repair$10–$1001–4 hrsDIY with tools and a manual
ICP (injection control pressure) sensor$60–$2000.5–2 hrsDIY with tools and a manual

Typical US independent-shop figures; labor runs about $120–$180 per hour (dealers charge more). Confirm the diagnosis before buying parts.

When to see a pro

If diagnosis points to internal high-pressure oil leaks, HPOP/STC fitting, branch tubes/standpipes/dummy plugs, or PCM issues, have a qualified diesel technician perform testing. Do not attempt high-pressure oil system disassembly without proper training and safety equipment.

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

  1. Curated DTC seed — 6.0 Power Stroke (curated) ↩︎ ↩︎ ↩︎

  2. Curated DTC seed — 6.0 Power Stroke (curated) ↩︎

  3. Curated DTC seed — 6.0 Power Stroke (curated) ↩︎