DDEC III/IV Single ECM Troubleshooting – Section 33.1 Description of Flash Code 33

Section 33.1
Description of Flash Code 33

Flash Code 33 indicates that the engine Turbo Boost Sensor (TBS), see Figure "Turbo Boost Sensor" and see Figure "Turbo Boost Sensor – 2003 Engines" , input to the ECM has exceeded 95% (normally > 4.75 volts) of the sensor supply voltage.‪

This diagnostic condition is typically:‪

• Open sensor return circuit
• Sensor signal circuit is shorted to the sensor +5 volt supply