U0638 Daihatsu Gran DTC Code

Daihatsu Gran Engine Specifications:

Engine Type :	Single Cylinder Engine
Cylinder Type :	Opposite Piston Engine
Engine Air Intake Process :	Supercharged Engine

Your Daihatsu Gran engine control system detects a problem, the computer stores the diagnostic trouble code U0638 in its memory. To figure out what is wrong with your vehicle you must first extract the U0638 DTC For Daihatsu Gran.

On 1999 and later U0638 Daihatsu Gran engines, the instrument cluster has a built-in self-diagnostic mode that can be accessed by pressing and holding the instrument cluster SELECT/RESET button. Insert the ignition key and turn to the RUN position (but don't crank or start engine). Continue to press and hold the SELECT/RESET button (for 5 seconds) until the word TEST is displayed by the odometer. Release the SELECT/RESET button within three seconds after the word TEST is displayed to begin the self-diagnostic mode.

U0638 Daihatsu Gran DTC Meaning

U	Network Code - Problem is climate control system, lighting, airbags, etc.
0	SAE - Generic
6	Vehicle Speed Control And Idle Control System
3	Low Coolant Circuit
8	Park/Neutral Postion (PNP) Switch Circuit Engine Torque Signal Circuit

If your vehicle failed a U0638 Daihatsu Gran test and the U0638 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses U0638 a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look U0638 DTC For Daihatsu Gran: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression.