7-23
FAULTY DIAGNOSIS
Fault Code
314
315
331
341
Fault Subject
UEGO(Universal Exhaust Gas Oxygen
Sensor) IA Fault
UEGO Heater Fault
MAP(Manifold Air Pressure Sensor)
Higher Than Expected
MAP Voltage Low
Conditions of Fault
The key is on
“
ON
”
position
- The engine warning lamp is on
- Closed Loop Function is not working
- Boost Pressure Fault Limp Home Mode
The key is on
“
ON
”
position
- The engine warning lamp is on
- Closed Loop Function is not working
- Boost Pressure Fault Limp Home Mode
The key is on
“
ON
”
position
- The engine warning lamp is on
- Adaptive Learn Function is not working
- Closed Loop Function is not working
- Boost Pressure Control Valve is off
- Standard Fuel / Air mixture ratio (Phi) = diagnosed level
- Max throttle value = examination is limited at
“
ON
”
position
The key is on
“
ON
”
position
- The engine warning lamp is on
- Adaptive Learn Function is not working
- Closed Loop Function is not working
- Boost Pressure Control Valve is off
- Standard Fuel / Air mixture ratio (Phi) = diagnosed level
- Max throttle value = examination is limited at
“
ON
”
position
Summary of Contents for BS Series
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