PACCAR MX (2004 Emissions) Fault Code: P113A Lambda Sensor Temperature – Unable to Reach Target

PACCAR MX (2004 Emissions) Fault Code: P113A Lambda Sensor Temperature – Unable to Reach Target

SET CONDITIONS:
The PCI ECU (D420) detects that the temperature of the lambda sensor is not within the expected values within 25 seconds or exceeds a safe maximum value.

DIAGNOSTIC CONDITION:
This diagnostic runs when the lambda sensor (F834) is in the operating mode.

RESET CONDITION:
This DTC changes to inactive when the fault is no longer detected.

POSSIBLE CAUSES:
Faulty lambda sensor

ADDITIONAL INFORMATION:
The PCI ECU uses the oxygen concentration in the exhaust measured by the lambda sensor (F834) to determine the air/fuel ratio of the combustion process. The sensor has an integrated heater to maintain a sensor operating temperature of approximately 750°C [1382°F].