P2370 serious

Injector Control Pressure Slow Response

The P2370 code means the vehicle's onboard diagnostic system has detected: Injector Control Pressure Slow Response. This is a serious severity code.

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Keep driving?
Short distances only
DIY difficulty
hard
Estimated cost
$250 - $800 (parts and labor)
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Common Symptoms

  • Check Engine Light illuminated
  • Hard starting especially when cold
  • Rough idle and engine surging
  • Reduced power under load
  • White or black smoke from exhaust

Probable Causes (Ranked by Likelihood)

  • Sluggish IPR valve response Very High
  • Contaminated engine oil restricting flow High
  • Worn high-pressure oil pump Moderate
  • ICP sensor calibration drift Low

Step-by-Step Diagnostic Procedure

  1. Read P2370 and review freeze frame data including ICP and IPR values

  2. Monitor ICP sensor readings at idle and compare to specifications

  3. Inspect IPR valve operation and test with a scan tool command

  4. Check engine oil level, condition, and high-pressure oil system for leaks

Frequently Asked Questions

What does P2370 mean?

P2370 indicates an issue with the fuel injector control pressure system: Injector Control Pressure Slow Response. This is common on diesel engines that use high-pressure oil to actuate fuel injectors.

Can I drive with P2370?

Drive only short distances. Incorrect injector control pressure affects fuel delivery, causing rough running, hard starts, and potential engine damage.

How much does it cost to fix P2370?

Repairs typically cost $250 to $800, depending on whether the IPR valve, ICP sensor, or oil pump needs service.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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