PACCAR MX P0095 is the fault code chapter the 2013 PACCAR MX Diagnostic Service Manual publishes for “Intercooler temperature – Data erratic, intermittent, or incorrect at ignition on”. The 5-page PDF is PACCAR’s own troubleshooting write-up for EPA2013 MX engines, reproduced exactly as the factory issued it.
Document details and coverage
| Brand | PACCAR |
|---|---|
| Group | DTCs / MX Engines (EPA2013) |
| Fault code | P0095 |
| Fault code information | 2 trip MIL, 3 drive cycle recovery, freeze frame type Comprehensive |
| Source manual | 2013 PACCAR MX Diagnostic Service Manual |
| Pages | 5 |
| File size | 0.5 MB |
| Format | |
| Language | English |
What sets PACCAR MX P0095 active
The diagnostic runs after the ignition has been keyed off continuously for at least 8 hours, when the difference between coolant and ambient temperature is small and the ambient temperature is above -20°C [-4°F]. The PCI ECU (D420) sets the code when the measured intercooler temperature differs by more than 3°C from the average of the other temperature sensor readings for more than 5 seconds. The eight-hour ignition-off diagnostic has three steps: leave the ignition off for 8 to 10 consecutive hours, key on with no engine start and wait 10 seconds, then start the engine and let it idle for 2 minutes.
Component and wiring checks
- PCI ECU connector D420.C pins C17 (intercooler temperature signal) and C40 (ground) to sensor connector F750 pins 1 and 2
- Intercooler temperature sensor resistance of 5248–5732 Ω at 0°C measured on the component connector
- Supply and signal voltage checks at the sensor connector with the ignition keyed on
Possible causes and repair notes
- An intercooler temperature reading that deviates from the other engine temperature sensors
- Faulty wiring or a damaged connector at the sensor
- A faulty intercooler temperature sensor (F750)
The intercooler outlet temperature is measured before the EGR mixer and is used to monitor intercooler performance. Because the diagnostic only arms after a long soak, the manual is strict that the truck must sit overnight before the verification cycle counts. Company and product background is on the official PACCAR website.
Who needs this PACCAR MX P0095 chapter
Heavy-duty diesel technicians and fleet shops reach for PACCAR MX P0095 when the code lands on a DAVIE scan and the repair has to follow the factory sequence instead of guesswork.
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