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ENGINEERED IN NAIROBI, KENYA
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  5. SPN-105
Cummins

SPN-105

Intake Manifold Temperature High

⚠️WARNING

Air entering the engine from the turbocharger is excessively hot. High intake air temperature reduces engine efficiency, increases exhaust temperatures, and can cause detonation. This fault typically indicates a problem with the charge air cooler (intercooler) or ambient temperature issues.

🔍 Possible Causes

  • •Restricted or damaged charge air cooler (intercooler)
  • •Coolant leak in charge air cooler (if water-to-air type)
  • •Failed or stuck intercooler bypass valve
  • •Blocked cooling fins on air-to-air intercooler
  • •High ambient temperature operation
  • •Turbocharger running excessively hot

🔧 Troubleshooting Steps

  1. 1Clean charge air cooler external fins of debris and dirt
  2. 2Check for boost leaks in intercooler piping and connections
  3. 3Inspect intercooler for internal restrictions or damage
  4. 4Verify intercooler bypass valve operation if equipped
  5. 5Check turbocharger for proper operation and bearing wear
  6. 6Ensure adequate ventilation in generator enclosure

🛠️ Parts You May Need

Charge Air Cooler (Intercooler)Intercooler HosesIntercooler Bypass ValveTemperature SensorTurbochargerCooling Fan Assembly

Need parts? We stock genuine Cummins parts with next-day delivery in Nairobi.Call +254 768 860 665

❓ Frequently Asked Questions

Why is my generator intake air temperature high?

High intake air temperature is usually caused by a dirty or restricted intercooler, boost leaks, or inadequate cooling airflow. In hot climates, ensure proper ventilation around the generator.

How often should I clean the charge air cooler?

Clean the external fins of air-to-air intercoolers at each major service or when visibly dirty. Inspect for internal restrictions annually or if high intake temp faults occur.

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Related Fault Codes

SPN-102Intake Manifold Pressure HighSPN-105Intake Manifold Temperature HighSPN-110Engine Coolant Temperature High