Corvette 2005-2008

7.0L V8 VIN E Std 2

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Trouble Code: P0140



HO2S Circuit Insufficient Activity (Bank 1 Sensor 2)

Possible Causes:



HO2S low reference circuit for an open/high resistance
 
HO2S signal circuit for a short to ground
 
HO2S signal circuit for a short to voltage
 
HO2S signal circuit for an open/high resistance
 
HO2S has failed
 
ECM has failed
 

Trouble Code: P0141



HO2S Heater Performance (Bank 1 Sensor 2)

Possible Causes:



HO2S ignition circuit for a short to ground or an open/high resistance
 
HO2S control circuit for a short to voltage, or an open/high resistance
 
HO2S control circuit for a short to ground
 
HO2S is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0151



HO2S Circuit Low Voltage Bank (2 Sensor 1)

Possible Causes:



HO2S low reference circuit for an open/high resistance
 
HO2S signal circuit for a short to ground
 
HO2S signal circuit for a short to voltage
 
HO2S signal circuit for an open/high resistance
 
HO2S has failed
 
ECM has failed
 

Trouble Code: P0152



HO2S Circuit High Voltage (Bank 2 Sensor 1)

Possible Causes:



HO2S low reference circuit for an open/high resistance
 
HO2S signal circuit for a short to ground
 
HO2S signal circuit for a short to voltage
 
HO2S signal circuit for an open/high resistance
 
HO2S has failed
 
ECM has failed
 

Trouble Code: P0155



HO2S Heater Performance (Bank 2 Sensor 1)

Possible Causes:



HO2S ignition circuit for a short to ground or an open/high resistance
 
HO2S control circuit for a short to voltage, or an open/high resistance
 
HO2S control circuit for a short to ground
 
HO2S is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0157



HO2S Circuit Low Voltage (Bank 2 Sensor 2)

Possible Causes:



HO2S low reference circuit for an open/high resistance
 
HO2S signal circuit for a short to ground
 
HO2S signal circuit for a short to voltage
 
HO2S signal circuit for an open/high resistance
 
HO2S has failed
 
ECM has failed
 

Trouble Code: P0158



HO2S Circuit High Voltage (Bank 2 Sensor 2)

Possible Causes:



HO2S low reference circuit for an open/high resistance
 
HO2S signal circuit for a short to ground
 
HO2S signal circuit for a short to voltage
 
HO2S signal circuit for an open/high resistance
 
HO2S has failed
 
ECM has failed
 

Trouble Code: P0161



HO2S Heater Performance (Bank 2 Sensor 2)

Possible Causes:



HO2S ignition circuit for a short to ground or an open/high resistance
 
HO2S control circuit for a short to voltage, or an open/high resistance
 
HO2S control circuit for a short to ground
 
HO2S is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0171



Fuel Trim System Lean (Bank 1)

Possible Causes:



Malfunctioning MAF
 
Low fuel pressure
 
Fuel contamination
 
Malfunctioning fuel injectors
 
Leaking exhaust components from the HO2S forward
 
Vacuum leaks at the intake manifold, the throttle body, and the injector O-rings
 
Air induction system and the air intake ducts for leaks or for a missing air filter element
 
Cracked or damaged EVAP canister
 
Crankcase ventilation system for leaks
 
HO2S signal circuit open, shorted to ground, or shorted to the low reference circuit
 
HO2S sensor 1 low signal circuit for an open circuit or high resistance
 
HO2S has failed
 
ECM has failed
 

Trouble Code: P0172



Fuel Trim System Rich (Bank 1)

Possible Causes:



Malfunctioning MAF
 
Excessive fuel pressure
 
Fuel contamination
 
Malfunctioning fuel injectors
 
Vacuum hoses for splits, kinks, and improper connections
 
Air duct for being collapsed or restricted element
 
Objects blocking the throttle body
 
Excessive fuel in the crankcase
 
Evaporative emissions control system for improper operation
 
HO2S signal circuit open, shorted to ground, or shorted to the low reference circuit
 
HO2S sensor 1 low signal circuit for an open circuit or high resistance
 
HO2S has failed
 
ECM has failed
 

Trouble Code: P0174



Fuel Trim System Lean (Bank 2)

Possible Causes:



Malfunctioning MAF
 
Low fuel pressure
 
Fuel contamination
 
Malfunctioning fuel injectors
 
Leaking exhaust components from the HO2S forward
 
Vacuum leaks at the intake manifold, the throttle body, and the injector O-rings
 
Air induction system and the air intake ducts for leaks or for a missing air filter element
 
Cracked or damaged EVAP canister
 
Crankcase ventilation system for leaks
 
HO2S signal circuit open, shorted to ground, or shorted to the low reference circuit
 
HO2S sensor 1 low signal circuit for an open circuit or high resistance
 
HO2S has failed
 
ECM has failed
 

Trouble Code: P0175



Fuel Trim System Rich (Bank 2)

Possible Causes:



Malfunctioning MAF
 
Excessive fuel pressure
 
Fuel contamination
 
Malfunctioning fuel injectors
 
Vacuum hoses for splits, kinks, and improper connections
 
Air duct for being collapsed or restricted element
 
Objects blocking the throttle body
 
Excessive fuel in the crankcase
 
Evaporative emissions control system for improper operation
 
HO2S signal circuit open, shorted to ground, or shorted to the low reference circuit
 
HO2S sensor 1 low signal circuit for an open circuit or high resistance
 
HO2S has failed
 
ECM has failed
 

Trouble Code: P0191



Fuel Rail Pressure (FRP) Sensor Performance

Possible Causes:



FRP sensor low reference circuit for an open/high resistance
 
FRP sensor 5-V reference circuit for a short to ground or an open/high resistance
 
FRP sensor 5-V reference circuit for a short to voltage
 
FRP sensor signal circuit for a short to ground or an open/high resistance
 
Fuel pump flow control module has failed
 
Fuel pressure sensor has failed
 

Trouble Code: P0192



Fuel Rail Pressure (FRP) Sensor Circuit Low Voltage

Possible Causes:



FRP sensor low reference circuit for an open/high resistance
 
FRP sensor 5-V reference circuit for a short to ground or an open/high resistance
 
FRP sensor 5-V reference circuit for a short to voltage
 
FRP sensor signal circuit for a short to ground or an open/high resistance
 
Fuel pump flow control module has failed
 
Fuel pressure sensor has failed
 

Trouble Code: P0193



Fuel Rail Pressure (FRP) Sensor Circuit High Voltage

Possible Causes:



FRP sensor low reference circuit for an open/high resistance
 
FRP sensor 5-V reference circuit for a short to ground or an open/high resistance
 
FRP sensor 5-V reference circuit for a short to voltage
 
FRP sensor signal circuit for a short to ground or an open/high resistance
 
Fuel pump flow control module has failed
 
Fuel pressure sensor has failed
 

Trouble Code: P0201



Fuel Injector 1 Control Circuit Malfunction

Possible Causes:



Injector 1 power circuit (B+) is open (check the power fuse)
 
Injector 1 control circuit is open between injector and ECM
 
Injector 1 control circuit is grounded between injector and ECM
 
Injector 1 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0202



Fuel Injector 2 Control Circuit Malfunction

Possible Causes:



Injector 2 power circuit (B+) is open (check the power fuse)
 
Injector 2 control circuit is open between injector and ECM
 
Injector 2 control circuit is grounded between injector and ECM
 
Injector 2 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0203



Fuel Injector 3 Control Circuit Malfunction

Possible Causes:



Injector 3 power circuit (B+) is open (check the power fuse)
 
Injector 3 control circuit is open between injector and ECM
 
Injector 3 control circuit is grounded between injector and ECM
 
Injector 3 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0204



Fuel Injector 4 Control Circuit Malfunction

Possible Causes:



Injector 4 power circuit (B+) is open (check the power fuse)
 
Injector 4 control circuit is open between injector and ECM
 
Injector 4 control circuit is grounded between injector and ECM
 
Injector 4 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0205



Fuel Injector 5 Control Circuit Malfunction

Possible Causes:



Injector 5 power circuit (B+) is open (check the power fuse)
 
Injector 5 control circuit is open between injector and ECM
 
Injector 5 control circuit is grounded between injector and ECM
 
Injector 5 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0206



Fuel Injector 6 Control Circuit Malfunction

Possible Causes:



Injector 6 power circuit (B+) is open (check the power fuse)
 
Injector 6 control circuit is open between injector and ECM
 
Injector 6 control circuit is grounded between injector and ECM
 
Injector 6 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0207



Fuel Injector 7 Control Circuit Malfunction

Possible Causes:



Injector 6 power circuit (B+) is open (check the power fuse)
 
Injector 6 control circuit is open between injector and ECM
 
Injector 6 control circuit is grounded between injector and ECM
 
Injector 6 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0208



Fuel Injector 8 Control Circuit Malfunction

Possible Causes:



Injector 6 power circuit (B+) is open (check the power fuse)
 
Injector 6 control circuit is open between injector and ECM
 
Injector 6 control circuit is grounded between injector and ECM
 
Injector 6 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0220



Throttle Position (TP) Sensor 2 Circuit

Possible Causes:



TP sensor low reference circuit for an open/high resistance
 
TP sensor 5-volt reference circuit for a short to ground or an open/high resistance
 
TP sensor 5-volt reference circuit for a short to voltage
 
TP sensor signal circuit terminal F for a short to ground
 
TP sensor 1 signal circuit for a short to ground or an open/high resistance
 
TP sensor 2 signal circuit for a short to voltage
 
TP sensor 2 signal circuit for an open/high resistance.
 
Throttle body has failed
 
ECM has failed
 

Trouble Code: P0222



Throttle Position (TP) Sensor2 Circuit Low Voltage

Possible Causes:



TP sensor low reference circuit for an open/high resistance
 
TP sensor 5-volt reference circuit for a short to ground or an open/high resistance
 
TP sensor 5-volt reference circuit for a short to voltage
 
TP sensor signal circuit terminal F for a short to ground
 
TP sensor 1 signal circuit for a short to ground or an open/high resistance
 
TP sensor 2 signal circuit for a short to voltage
 
TP sensor 2 signal circuit for an open/high resistance.
 
Throttle body has failed
 
ECM has failed
 

Trouble Code: P0223



Throttle Position (TP) Sensor 2 Circuit High Voltage

Trouble Code: P0230



Fuel Pump Relay Control Circuit (with LS9 engine)

Possible Causes:



Fuel pump relay control circuit for a short to ground
 
Fuel pump relay control circuit for an open/high resistance
 
Fuel pump relay control circuit for an short to voltage
 
Fuel pump control module (FPCM) has failed
 
ECM has failed
 

Trouble Code: P0230



Fuel Pump Relay Control Circuit (with out LS9 engine)

Possible Causes:



Fuel pump relay control circuit for a short to ground
 
Fuel pump relay control circuit for an open/high resistance
 
Fuel pump relay control circuit for an short to voltage
 
Fuel pump relay has failed
 
ECM has failed
 

Trouble Code: P023A



Charge Air Cooler (CAC) Coolant Pump Relay Control Circuit

Possible Causes:



CAC relay control circuit for a short to voltage.
 
CAC relay control B+ coil supply circuit for a short to ground or an open/high resistance
 
CAC relay control B+ switch supply circuit for an open/high resistance
 
CAC pump voltage supply circuit for a short to ground
 
CAC pump ground circuit for an open/high resistance
 
CAC pump voltage supply circuit for an open/high resistance
 
CAC pump control circuit for a short to ground
 
CAC coolant pump relay has failed
 
CAC coolant pump has failed
 
ECM has failed
 

Trouble Code: P025A



Fuel Pump Control Module Enable Circuit

Possible Causes:



FPCM has failed
 
ECM has failed
 

Trouble Code: P0300



Multiple Engine Misfire Detected

Possible Causes:



Base engine mechanical fault that affects one or more cylinders
 
Fuel metering fault that affects more than one cylinder
 
Fuel pressure too low or too high, fuel supply contaminated
 
EVAP system problem or the EVAP canister is fuel saturated
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
IC control circuit is shorted to ground (an intermittent fault)
 
Ignition system fault (a coil) that affects more than one cylinder
 
MAF sensor contamination (it can cause a very lean condition)
 

Trouble Code: P0301



Cylinder 1 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCV system
 
Base engine mechanical fault that affects only Cylinder 1
 
Fuel delivery component fault that affects only Cylinder 1 (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil, plug) that affects only Cylinder 1
 

Trouble Code: P0302



Cylinder 2 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCV system
 
Base engine mechanical fault that affects only Cylinder 2
 
Fuel delivery component fault that affects only Cylinder 2 (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil, plug) that affects only Cylinder 2
 

Trouble Code: P0303



Cylinder 3 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCV system
 
Base engine mechanical fault that affects only Cylinder 3
 
Fuel delivery component fault that affects only Cylinder 3 (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil, plug) that affects only Cylinder 3
 

Trouble Code: P0304



Cylinder 4 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCV system
 
Base engine mechanical fault that affects only Cylinder 4
 
Fuel delivery component fault that affects only Cylinder 4 (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil, plug) that affects only Cylinder 4
 

Trouble Code: P0305



Cylinder 5 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCV system
 
Base engine mechanical fault that affects only Cylinder 5
 
Fuel delivery component fault that affects only Cylinder 5 (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil, plug) that affects only Cylinder 5
 

Trouble Code: P0306



Cylinder 6 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCV system
 
Base engine mechanical fault that affects only Cylinder 6
 
Fuel delivery component fault that affects only Cylinder 6 (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil, plug) that affects only Cylinder 6
 

Trouble Code: P0307



Cylinder 7 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCV system
 
Base engine mechanical fault that affects only Cylinder 7
 
Fuel delivery component fault that affects only Cylinder 7 (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil, plug) that affects only Cylinder 7
 

Trouble Code: P0308



Cylinder 8 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCV system
 
Base engine mechanical fault that affects only Cylinder 8
 
Fuel delivery component fault that affects only Cylinder 8 (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil, plug) that affects only Cylinder 8
 

Trouble Code: P0313



Misfire Detected With Low Fuel Level

Possible Causes:



Damaged reluctor wheel
 
Damaged accessory drive component or belt
 
Certain rough road conditions
 
Variable thickness brake rotors
 
Tire or wheel that is out of round or out of balance
 
Engine vacuum leaks
 
Fuel pressure that is too low or too high
 
Contaminated fuel
 
Restricted exhaust system
 

 
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