ON-BOARD DIAGNOSTIC
01–02–14
P0140 Rear HO2S no activity detected
• The PCM monitors the input voltage from the rear HO2S when the following conditions are met. Under the
following monitoring conditions, if the input voltage from the rear HO2S does not even exceed 0.55 V though
the short term fuel trim is controlled up to 20.5% for 9.6 s, the PCM determines that sensor circuit is not
activated.
MONITORING CONDITIONS
— HO2S, HO2S heater and TWC repair verification drive mode
— Following conditions are met for above 20.8 s
• Engine speed is above 1,500 rpm.
• Engine coolant temperature is above 70 °C {158 °F}.
— Rear HO2S voltage is above 0.1 V
P0222 TP sensor No.2 circuit low input
• If PCM detects TP sensor No.2 voltage is to be below 0.1 V after the ignition switch to the ON position, the
PCM determines that TP circuit has a malfunction.
P0223 TP sensor No.2 circuit high input
• If the PCM detects the TP sensor No.2 voltage is to be above 4.9 V after the ignition switch to the ON position,
the PCM determines that the TP circuit has a malfunction.
P0300 Random misfire detected
• The PCM monitors CKP sensor input signal interval time. The PCM calculates change of interval time for each
cylinder. If change of interval time exceeds preprogrammed criteria, the PCM detects misfire in the
corresponding cylinder. While the engine is running, the PCM counts number of misfires that occurred at 200
crankshaft revolutions and 1,000 crankshaft revolutions and calculates misfire ratio for each crankshaft
revolution. If the ratio exceeds the preprogrammed criteria, the PCM determines that a misfire, which can
damage catalytic converter or affect emission performance, has occurred.
P0301, P0302, P0303, P0304 Cylinder No.1, No.2, No.3, No.4 misfire detected
• The PCM monitors CKP sensor input signal interval time. The PCM calculates the change of interval time for
each cylinder. If the change of interval time exceeds the preprogrammed criteria, the PCM detects a misfire in
the corresponding cylinder. While the engine is running, the PCM counts number of misfires that occurred at
200 crankshaft revolutions and 1,000 crankshaft revolutions and calculates misfire ratio for each
crankshaft revolution. If the ratio exceeds the preprogrammed criteria, the PCM determines that a misfire,
which can damage catalytic converter or affect emission performance, has occurred.
P0327 KS circuit low input
• The PCM monitors input signal from the KS when the engine is running. If the input voltage is below 0.01 V the
PCM determines that the KS circuit has a malfunction.
P0328 KS circuit high input
• The PCM monitors the input signal from the KS when the engine is running. If the input voltage is above 4.58 V
the PCM determines that KS circuit has a malfunction.
P0335 CKP sensor circuit problem
• If the PCM does not receive the input voltage from the CKP sensor for 4.2 s while the MAF is 1.95 g/s {0.25 lb/
min.} or above, the PCM determines that the CKP sensor circuit has a malfunction.
• If a malfunction is detected in the input pulse pattern from the CKP sensor.
P0340 CMP sensor circuit problem
• The PCM monitors the input voltage from the CMP sensor when the engine is running. If the PCM does not
receive the input voltage from the CMP sensor while the PCM receives the input signal from the CKP sensor,
the PCM determines that the CMP circuit has a malfunction.
• If a malfunction is detected in the input pulse pattern from the CMP sensor.
P0401 EGR flow insufficient detected
• PCM monitors difference in intake manifold pressures when EGR is operated and when it is stopped. If the
difference is too small, PCM determines that EGR flow insufficient.
P0403 EGR valve (stepping motor) circuit problem
• The PCM monitors the EGR valve control signal voltage and current. If the following conditions are met, the
PCM determines that there is the EGR control circuit problem.
— The PCM turns the EGR valve off, but the voltage of the EGR valve control signal remains low.
— The PCM turns the EGR valve on, but the current of the EGR valve control signal remains high.
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