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8) Code 335: Verify KOER Codes Code 335 indicates PFE/DPFE sensor is out of self-test range (2.6-4.2 volts) and may be faulty. PFE/DPFE system can detect lack of pressure in exhaust system. A garage exhaust ventilation system, installed during KOEO SELF-TEST, may cause PFE/DPFE sensor to generate Code 335. Remove exhaust ventilation system. Repeat KOEO SELF-TEST. Service codes as necessary. If no codes are present during KOEO SELF-TEST, complete QUICK TEST. If Code 335 is present during KOEO SELF-TEST, go to next step.
9) Check PFE/DPFE Sensor Pressure Input Hose Remove pressure feed tube from PFE/DPFE sensor. Inspect tube, including PFE/DPFE inlet, for blockage. Repair if necessary, and repeat QUICK TEST. If no blockage is found, go to next step.
10) Measure VREF Circuit Voltage With ignition off, disconnect PFE/DPFE sensor wiring harness connector. Turn ignition on. Measure voltage between VREF and SIG RTN terminals at PFE/DPFE sensor wiring harness connector. If voltage is 4-6 volts, replace PFE/DPFE sensor and repeat QUICK TEST. If voltage is not 4-6 volts, go to CIRCUIT TEST C.
Tuesday, June 9th, 2009 AT 4:19 PM