Specifications

ON-BOARD DIAGNOSTIC [LF]
01-02–12
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.
P0421 Warm up catalyst system efficiency below threshold
• PCM compares number of front HO2S and rear HO2S inversions for a predetermined time. PCM monitors
number of inversions rear side performs while front side inverts for a specified number of times when the
following monitoring conditions are met, PCM detects inversion ratio. If inversion ratio is below threshold, PCM
determines that catalyst has deteriorated.
MONITORING CONDITION
— Calculated TWC temperature: more than 400 °C {752 °F}
— Engine speed: 1,500—3,000 rpm
— LOAD: 15—48 % (at engine speed 2,000 rpm)
P0441 Evaporative emission control system incorrect purge flow
• PCM measures the purge line pressure, which is the vacuum when a following condition. If vacuum between
charcoal canister and intake manifold does not reach the specified, PCM determines that the EVAP system has
clogging.
MONITORING CONDITION
— Engine speed: 1,500—3,500 rpm
— Throttle opening angle:11—20 %
— Vehicle speed: 69.5—136 km/h {43.2—84.5 mph} [MT]/34.5—136 km/h {21.4—84.5 mph} [AT]
P0442 Evaporative emission control system leak detected (small leak)
• PCM measures the pump load current (EVAP line pressure) when the specified period has passed after EVAP
system is sealed when monitoring conditions are met. If the load does not reach the reference current value
within the specified period, PCM determines that the EVAP system has small leak.
MONITORING CONDITION
— The ignition switch is turned off.
— IAT: 4.4—35 °C {40—95 °F}
— Battery voltage: 11 V or above
— Atmospheric pressure: 72.2 kPa {542 mmHg, 21.3 inHg} or above
— Fuel tank level: 15—85%
— Time from engine off: 5 h 10 min.
P0443 Purge solenoid valve circuit problem
• The PCM monitors the purge solenoid valve control signal voltage and current. If the following conditions are
met, the PCM determines that there is the purge solenoid valve control circuit problem.
— The PCM turns the purge solenoid valve off, but the voltage of the purge solenoid valve control signal
remains low.
— The PCM turns the purge solenoid valve on, but the current of the purge solenoid valve control signal
remains high.
P0446 Change over valve (COV) (EVAP system leak detection pump) stuck close
• The PCM monitors pump load current (EVAP line pressure), while evaporative leak monitor is operating. When
the decrease in pump load current is less than the specification after the reference current value has been
obtained, the PCM determines change over valve (COV) in EVAP system leak detection pump has a
malfunction.
3404-1U-05F(01-02).fm 12 ページ ２００６年７月３日 月曜日 午前９時５０分