4C20 Gasoline Engine Repair Manual
(5) BLMCELL value received and stored. (b) Malfunction
detection principle: the engine control unit determines that the lambda value received
(c) Emergency operation: the boost pressure is assumed to be the default value. (d) Possible causes of malfunction: (1) Faulty wiring
harness; (2) Short to ground or open in sensor circuit.
DTC P2229: Barometric pressure sensor circuit
short to high voltage circuit
th voltage.
nia
in the process of self-adaptation, exceeds 1.4. (c)
Failsafe operation: suppression of the catalytic converter diagnostic function. (d) Possible causes of malfunction: insufficient amount of fuel
in the fuel tank and too low
pressure in the fuel system.
(a) Prerequisites: The engine is running. (b) Fault detection
principle: the voltage according to the reading of the sensor is greater than 98% of the value
DTC P2188 - Idle RPM Too Rich (a) Prerequisites:
reference voltage. (c)
Emergency operation: the boost pressure is assumed to be the default value. (d) Possible causes of malfunction: (1) Faulty wiring
harness; (2) Short circuit in the sensor circuit to high
voltage. DTC U0001: CAN bus communication
failure (a) Prerequisites: engine control unit connected or engine running.
(b) Malfunction detection principle: the engine control unit does not receive signals
via the CAN bus from the nodes
(c) Emergency operation: default values are accepted. (d) Possible causes of failure: loose connections
or an open circuit in the CAN bus. DTC U0073: Short circuit in the CAN bus circuit (a) Prerequisites: engine control unit is connected,
or the engine is running. (b) Fault detection principle: The CAN bus communication
unit detects the presence of a short circuit. (c) Emergency operation: default values are accepted. (d) Possible causes of
malfunction: (1) Short circuit between CAN Hi and CAN Lo circuits; (2) CAN Hi circuit short to ground;
(1) The engine is idling; (2) Atmospheric pressure above 72 kPa;
(3) The intake air temperature is greater than -7°C; (4)
Battery voltage is over 11V; (5) BLMCELL value received and stored.
(b) Malfunction detection principle: the engine
control unit determines that the lambda value obtained during
self-adaptation is greater than below 0.7. (c) Failsafe operation: suppression of the catalytic converter diagnostic function. (d) Possible causes of
malfunction: insufficient amount of fuel in the fuel tank and too
low
pressure in the fuel system.
tires.
DTC P2610: LPC Malfunction or LPC Reset Malfunction (a) Prerequisites: Engine running. (b) Fault detection principle: system timer
fault. (c) Emergency operation: not provided. (d) Possible
causes of failure:
(1) Strong electromagnetic interference; (2) Engine
control unit hardware failure. DTC P2228 - Barometric pressure sensor circuit short to low voltage
or open circuit in this sensor circuit (a) Prerequisites: Engine running. (b) Fault detection principle: the voltage according to the reading of the sensor is 2%
lower than the value of the reference
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