DTC
Description
Possible Cause
Action
P0072-00 Ambient Air Temperature
Sensor Circuit Low - No sub
type information
• NOTE: - I_A_IATS -
Ambient air temperature
sensor circuit short circuit
to ground, open circuit
Refer to the electrical circuit diagrams
and check ambient air temperature
sensor circuit - I_A_IATS - For short
circuit to ground, open circuit
Carry out the pinpoint tests associated
with this DTC using the manufacturer
approved diagnostic system
P0073-00 Ambient Air Temperature
Sensor Circuit High - No sub
type information
• NOTE: - I_A_IATS -
Ambient air temperature
sensor circuit short circuit
to power
Ambient air temperature
sensor fault
Refer to the electrical circuit diagrams
and check ambient air temperature
sensor circuit - I_A_IATS - For short
circuit to power
P0087-00 Fuel Rail/System Pressure -
Too Low - No sub type
information
• NOTE: - Circuit I_A_RALPS -
Fuel rail pressure sensor
circuit short circuit to
ground, short circuit to
power, open circuit, high
resistance
Fuel starvation
Fuel lines leaking
Fuel lines restricted
Blocked air filter
Refer to the electrical circuit diagrams
and check the fuel rail pressure sensor
circuit for short circuit to ground, short
circuit to power, open circuit, high
resistance
Check the fuel lines for any signs of
leakage, replace as required
Check the fuel lines for any signs of
damage, crimping or restrictions, replace
as required
Check for blocked air filter, replace as
required
P0087-21 Fuel Rail/System Pressure -
Too Low - Signal amplitude <
minimum
• NOTE: - Circuit I_A_RALPS -
Fuel rail pressure sensor
circuit short circuit to
ground, short circuit to
power, open circuit, high
resistance
Fuel starvation
Fuel lines leaking
Fuel lines restricted
Blocked air filter
Refer to the electrical circuit diagrams
and check the fuel rail pressure sensor
circuit for short circuit to ground, short
circuit to power, open circuit, high
resistance
Check the fuel lines for any signs of
leakage, replace as required
Check the fuel lines for any signs of
damage, crimping or restrictions, replace
as required
Check for blocked air filter, replace as
required
P0087-22 Fuel Rail/System Pressure -
Too Low - Signal amplitude >
maximum
• NOTE: - Circuit I_A_RALPS -
Fuel rail pressure sensor
circuit short circuit to
ground, short circuit to
power, open circuit, high
resistance
Fuel starvation
Fuel lines leaking
Fuel lines restricted
Blocked air filter
Refer to the electrical circuit diagrams
and check the fuel rail pressure sensor
circuit for short circuit to ground, short
circuit to power, open circuit, high
resistance
Check the fuel lines for any signs of
leakage, replace as required
Check the fuel lines for any signs of
damage, crimping or restrictions, replace
as required
Check for blocked air filter, replace as
required
P0087-23 Fuel Rail/System Pressure -
Too Low - Signal stuck low
• NOTE: - Circuit I_A_RALPS -
Fuel rail pressure sensor
circuit short circuit to
ground
Fuel starvation
Fuel lines leaking
Fuel lines restricted
Blocked air filter
Refer to the electrical circuit diagrams
and check the fuel rail pressure sensor
circuit for short circuit to ground
Check the fuel lines for any signs of
leakage, replace as required
Check the fuel lines for any signs of
damage, crimping or restrictions, replace
as required
Check for blocked air filter, replace as
required
P0088-00 Fuel Rail/System Pressure -
Too High - No sub type
information
• NOTE: - Circuit I_A_RALPS -
Fuel rail pressure sensor
circuit short circuit to
power
Fuel starvation
Fuel lines leaking
Fuel lines restricted
Blocked air filter
Refer to the electrical circuit diagrams
and check the fuel rail pressure sensor
circuit for short circuit to power
Check the fuel lines for any signs of
leakage, replace as required
Check the fuel lines for any signs of
damage, crimping or restrictions, replace
as required
Check for blocked air filter, replace as
required
P0088-21 Fuel Rail/System Pressure -
Too High - Signal amplitude
< minimum
• NOTE: - Circuit I_A_RALPS -
Fuel lines restricted
Pressure control valve
circuit short circuit to
power
Pressure control valve
Using the manufacturer approved
diagnostic system, check engine control
module, for related DTCs and refer to
the relevant DTC index
Check the fuel lines for any signs of
damage, crimping or restrictions, replace
as required