Polaris Frontier Owner's Manual page 32

FEATURES AND CONTROLS
Malfunction Indicator Lamp (MIL)
The Frontier is equipped with a
malfunction indicator lamp (CHECK
ENGINE light) to assist your Polaris dealer
in diagnosing problems. The MIL codes
are for reference only. Full diagnostics
must be performed by a Polaris dealer
trained to service EFI systems.
When enabled, the CHECK ENGINE light
will blink in numerical sequences to
indicate the type of failure. For example: two blinks, pause, one blink
is the sequence for code 21. To enable the blink codes, put a 30 amp
automotive fuse in the ACS bypass three times within 2 1/2 seconds,
leaving it in the third time. NOTE: Disconnect the negative battery
lead for 10 seconds to clear the code.
If the ACS 30 AMP bypass fuse is left in, electrical drainage will
occur. To avoid electrical drainage, always remove the fuse from the
ACS bypass AFTER the End of Sequence message (61) appears.
MIL Diagnostic Code Summary
CODE MIL
21 Yes
22 Yes
23 Yes
24 Yes
31 Yes
32 Yes
33 No
34 No
42 Yes
61 NA
30
CAUTION
Description
Lost synchronization
Synchronization of crankshaft position lost
Throttle position sensor circuit error
Sensor signal is shorted to ground or at battery potential
RAM error
Hardware failure or serial EEPROM not initialized or failure
Speed circuit / sensor error
Crankshaft position sensor failure (if MIL stays on when cranking
there is no speed sensor input)
System too lean
Lambda sensor shorted to ground or battery voltage
02 Sensor circuit error
Short to battery or no activity detected
System too rich
Short term adaption at upper or lower limit.
Maximum adaption limit reached
Long-term adaption at upper or lower limit
Temperature sensor circuit error
Sensor short to ground/battery voltage/implausible signal
End of sequence message