The PACCAR MX P1139 page of the 2013 PACCAR MX Diagnostic Service Manual is the manufacturer reference for diagnostic trouble code P1139, described in the manual as “Lambda heater calibration test fault”. It is a 1-page PDF section covering lambda heater calibration diagnostics on EPA2013 PACCAR MX engines, and it keeps the same layout as every other code page in that manual.
Document details and coverage
| Brand | PACCAR |
| Model coverage | PACCAR MX engines, EPA2013 emissions |
| System group | DTCs / MX Engines (EPA2013) |
| Source publication | 2013 PACCAR MX Diagnostic Service Manual |
| Fault code | P1139 |
| Subject | Lambda heater calibration |
| Pages | 1 |
| File size | 0.3 MB |
| Format | |
| Language | English |
What PACCAR MX P1139 means
The manual gives P1139 a single line of fault code information and directs the technician to contact the Engine Support Center. No trip count, readiness group, freeze frame type, set condition or reset condition is printed on this page, which is why the entry is only 1 page long.
Possible causes and technical data
The possible causes field on this page reads “no possible causes available”, so the printed troubleshooting order is the only guidance the manual gives.
This is a single-page entry. Under fault code information the manual gives one instruction: contact the Engine Support Center. There is no component table, no set or reset condition and no numbered troubleshooting procedure printed for this code. Everything on this PACCAR MX P1139 page is reference material rather than a numbered step list, so the technician works from the condition data and the possible causes with DAVIE connected.
Who needs this PACCAR MX P1139 manual page
Heavy-duty technicians, fleet shops and independent workshops diagnosing Kenworth and Peterbilt trucks with EPA2013 PACCAR MX engines use this page to confirm what the ECU actually measured before parts are ordered. For engine literature, dealer locations and support contacts beyond this single code, start at the PACCAR corporate website.
The complete MX P1139 extract from the 2013 PACCAR MX Diagnostic Service Manual is filed in the DiagTechPro manuals library, where the 1-page PDF can be viewed or downloaded with a free account.
Related manuals library
