Lexus - Toyota OBD1 Diagnostic Trouble Code
42
Vehicle Speed Sensor Signal
Area
Open or short in vehicle speed sensor circuit
Vehicle speed sensor
Speedometer fault
Engine Control Module(ECM)
Diagnosis
SPD signal is not input to the ECM for at least 8 seconds during high load driving with engine speed between 2,750 rpm and 4,000 rpm.
Load is determined by RPM, TPS and air flow inputs.