TuningBot DTC Database · v4.37.14
5 manufacturer-specific interpretations across 4 manufacturers in the TuningBot DTC database.
FordThe control module judged the A/C Evaporator Air Temperature signal implausible: it stayed inside electrical limits but did not match the value expected for the current operating conditions. This is the manufacturer-specific definition used by Ford.
HondaThe control module detected that the Motor driver module temperature exceeded its permissible limit. This is the manufacturer-specific definition used by Honda.
LexusThe control module detected that the signal in the HC catalytic converter, variable valve circuit stayed below the expected operating range. This is the manufacturer-specific definition used by Lexus.
VAGThe control module detected an interruption (open circuit) in the Exhaust gas recirculation (EGR) valve/solenoid, Bank 2 circuit, so the expected electrical continuity was not present. This is the manufacturer-specific definition used by Audi.
The control module detected an interruption (open circuit) in the Exhaust gas recirculation (EGR) valve/ solenoid circuit, so the expected electrical continuity was not present. This is the manufacturer-specific definition used by Volkswagen.
Powertrain: engine, transmission and driveline systems.
Manufacturer-defined range: the meaning can differ between brands.
Specific fault index within the subsystem.
Diagnostic Trouble Code (5 interpretations). The control module judged the A/C Evaporator Air Temperature signal implausible: it stayed inside electrical limits but did not match the value expected for the current operating conditions. This is the manufacturer-specific definition used by Ford.
P1438 is a manufacturer-specific code. In this database it is documented for: Ford, Honda, Lexus, VAG. The same number can mean something different on other brands.
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
Understand the system behind this code: Oxygen Sensors (Lambda)
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