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Retrieving Codes
FAULT CODE DEFINITIONS FOR EEC-IV SYSTEMS (312 - 416)
Chapter 4 60
TEST
CODE CONDITION FAULT CODE DEFINITION
312 R Thermactor air system/fault during engine
run self-test
313 R Thermactor air system/air not bypassed
during self-test
314 R (Cars ONLY): Thermactor air system/fault
during engine run self-test / left side
326 R, C (Cars ONLY): EGR sensor circuit voltage
lower than expected
327 O, R, C EGR valve position circuit below minimum
voltage
327 * EVP/EPT circuit below minimum voltage
328 O, R, C EGR closed valve voltage lower than
expected
332 R, C Insufficient EGR flow detected
334 O, R, C EGR closed valve voltage high
335 O EGR sensor circuit voltage higher or lower
than expected during self-test
336 R, C EGR sensor circuit voltage higher than
expected
336 R, C (Trucks ONLY): Exhaust pressure high
337 O, R, C EGR sensor circuit above maximum voltage
338 C (Cars ONLY): Engine Coolant temperature
(ECT) lower than expected
339 C (Cars ONLY): Engine Coolant temperature
(ECT) higher than expected
341 R (Cars ONLY): Octane adjust service pin
open
381 C Erratic A/C compressor clutch cycling
411 R Cannot control RPM during KOER low
RPM check
412 R Cannot control RPM during KOER high
RPM check
415 * Idle speed control system at minimum
learning limit
416 * Idle air control system at maximum
learning limit
4
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