Table of Contents
Error Code P063E is defined as Auto Configuration Throttle Input Not Present. This code is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system, especially those made since 1996 up to present. This may include vehicles from Hyundai, Kia, Mazda, Nissan, Toyota, etc. Specifications on the definition, troubleshooting, and repairs vary from make, model, and powertrain configuration.
When Error Code P063E appears, this means the PCM (powertrain control module, also known as ECM or engine control module in other vehicle makes) is unable to detect the auto-configuration throttle input signal of the vehicle.
Modern vehicles conduct self-test as soon as the ignition cylinder is turned into ON position and various onboard controllers are energized (including the PCM). The PCM depends on the input signals from engine sensors to configure the engine start-up strategy and perform these self-tests. One of the key input signal required for PCM’s auto-configuration is the Throttle Position.
The TPS (throttle position sensor) should provide the PCM (and other controllers) with a throttle input signal for automatic configuration purposes. The TPS is a variable resistance sensor mounted on the throttle body assembly. Its tip plate shaft slips inside the TPS. As the plate shaft of the throttle moves (either through an accelerator cable or drive-by-wire system), it also moves the potentiometer inside the TPS, causing variation in the circuit resistance. The result of which is a change in TPS signal circuit voltage to the PCM.
When the ignition switched is turned ON to energize the PCM, but the PCM is unable to detect a throttle position input circuit, then Error Code P063E will be stored and activate the Check Engine light. The auto-configuration system may also be deactivated, resulting in serious drivability issues.
This code causes drivability issues, such as:
- Engine stalling at idle (especially at startup)
- Delayed engine start
Other TPS related codes may be present as well.
- Defective TPS
- Corrosion in TPS connector
- Open or shorted circuit between TPS and PCM
- Damaged or programming error in PCM
How to Check
If there are other TPS-related codes present, they must be diagnosed and repaired first before attempting to fix Error Code P063E.
For a more accurate diagnosis, you need a diagnostic scanner, DVOM (digital volt/ohmmeter), and a dependable vehicle information source.
Before starting your diagnosis, make sure to consult with your vehicle information for the applicable (TSB) technical service bulletins. If you see one that matches the vehicle symptoms and codes with what you’re experiencing, then it may speed up your diagnosis.
Start your diagnosis by connecting the scanner to the vehicle diagnostic port, retrieve all stored codes and their pertinent freeze frame data. Then, clear the codes and then take the vehicle for a test drive until one of the two scenarios occur:
- The code does NOT reset and PCM enters readiness mode
- The code resets
If the code does NOT come back, then you’re dealing with an intermittent condition, which means the problem may have to worsen before you can diagnose it more accurately.
If the code comes back on the other hand, then continue with the diagnosis.
Check all the related connectors and wirings. Check the PCM power supply fuses and relays. Repair as necessary.
Check the diagnostic flow chart, connector face views, wiring diagrams, connector pin-out charts, component testing specifications and procedures for your vehicle from the vehicle information source.
As soon as you have the right information, test the ECT voltage, ground, and signal circuits using the DVOM.
Start the simple test at TPS connector, test for voltage and ground signals. If there’s no voltage, then use the DVOM to trace the circuit back to the right terminal of the PCM connector. If there is still no voltage on this pin, then you can suspect a defective PCM.
If there is a voltage at the PCM connector pin, however, then there’s an open circuit condition. You can proceed on repairing the open circuit between the PCM and TPS.
If there’s no ground, then trace the circuit back to the central ground location, make the necessary repair.
If there are ground and voltage at the TPS connector, then proceed to the next step.
The TPS data can be accessed through the scanner data stream, live data from the TPS signal circuit may be gathered using DVOM. Live data is more accurate than the observed data in the scanner data stream display. You can use an oscilloscope to test the TPS signal circuit, but this is not always required.
Connect the positive test lead of the DVOM to the TPS signal circuit ((with the TPS connector plugged-in and the key-on-engine off). Connect the negative test lead of the DVOM to battery or chassis ground.
Then, observe the TPS signal voltage while slowly opening and closing the throttle. If there are voltage or glitches spikes, then you can suspect a defective TPS. The voltage for TPS signal ranges between 0.5V at idle to 4.5V at wide open throttle.
If the TPS and all system circuits are working fine, then you can suspect a defective or programming error in the PCM.
How to Fix
Depending on your diagnosis, common repairs for this code include:
- Repair or replacement of damaged wires or connectors
- Repair or replacement of open circuit between PCM and TPS
- Replacement of TPS
- Replacement or reprogramming of PCM
Error Code P063E may be applicable to conventional or drive-by-wire throttle body systems.
Auto configuration for this code must be taken seriously, as engine start-up idle quality and drivability may be both at risk. This is why this code is regarded as severe or serious.