P063E Auto Configuration Throttle Input Not Present
OBD-II Trouble Code Technical Description
Auto Configuration Throttle Input Not Present
What does that mean?
This is a generic diagnostic trouble code (DTC) and applies to many OBD-II vehicles (1996-newer). That may include but is not limited to vehicles from Nissan, Toyota, Mazda, Hyundai, Kia, etc. Although generic, the exact repair steps may vary depending on year, make, model and powertrain configuration.
If your OBD-II equipped vehicle has stored a code P063E, it means that the powertrain control module (PCM) has not detected an auto configuration throttle input signal.
When the ignition cylinder is placed in the ON position and the various on-board controllers (the PCM included) are energized, multiple self-tests are initiated. The PCM depends upon input signals from engine sensors to automatically configure an engine start-up strategy and perform these self-tests. Throttle position is among the key input signals required by the PCM for auto configuration.
The throttle position sensor (TPS) should provide the PCM (and other controllers) with a throttle input signal for automatic configuration purposes. The TPS is a variable resistance sensor that is mounted on the throttle body assembly. The tip of the throttle plate shaft slips inside the TPS. As the throttle plate shaft is moved (either via the accelerator cable or drive-by-wire system), it also moves a potentiometer inside the TPS and causes a variation in circuit resistance. The result is a change in TPS signal circuit voltage to the PCM.
If the PCM fails to detect a throttle position input circuit, when the ignition switch is placed in the ON position and the PCM is energized, a code P063E will be stored and a malfunction indicator lamp may be illuminated. The auto configuration system may also be deactivated; resulting in serious drivability issues.
A typical throttle body:
What is the severity of this DTC?
Auto configuration codes should be taken seriously as engine start up idle quality and drivability may be at risk. Classify a stored code P063E as severe and address it as such.
What are some of the symptoms of the code?
Symptoms of a P063E trouble code may include:
Engine stall at idle (especially at start up) Delayed engine start Drivability issues Other TPS related codesWhat are some of the common causes of the code?
Causes for this code may include:
Defective TPS Open or shorted circuit between the TPS and PCM Corrosion in TPS connector Bad PCM or PCM programming errorWhat are some P063E troubleshooting steps?
If there are any other TPS related codes present, diagnose and repair those before attempting to diagnose the P063E.
A diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information will be required to accurately diagnose a code P063E.
Consult your source of vehicle information for applicable technical service bulletins (TSB). If you discover one that matches the vehicle, symptoms, and codes with which you are wrestling, it may aid in reaching a correct diagnosis.
I always begin any code diagnosis by connecting the scanner to the vehicle diagnostic port and retrieving all stored codes and pertinent freeze frame data. I like to write this information down (or print it if possible) in case I need it later (after the codes are cleared). Next, I clear the codes and test drive the vehicle until one of two scenarios occurs:
A. The code fails to reset and the PCM enters readiness mode
B. The code is reset
If scenario A occurs, you are dealing with an intermittent code and the conditions which caused it may have to worsen before an accurate diagnosis can be made.
If scenario B occurs, continue with the steps listed below.
Step 1
Perform a visual inspection
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