Sierra, Silverado 2006-2007

4.8L V8 VIN C Auto 2

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Trouble Code: P0137



HO2S Circuit Low Voltage Bank 1 Sensor 2

Trouble Code: P0138



HO2S Circuit High Voltage Bank 1 Sensor 2

Trouble Code: P0140



HO2S Circuit Insufficient Activity Bank 1 Sensor 2

Trouble Code: P0141



HO2S Heater Performance Bank 1 Sensor 2

Trouble Code: P0151



HO2S Circuit Low Voltage Bank 2 Sensor 1

Trouble Code: P0152



HO2S Circuit High Voltage Bank 2 Sensor 1

Trouble Code: P0153



HO2S Slow Response Bank 2 Sensor 1

Trouble Code: P0154



HO2S Circuit Insufficient Activity Bank 2 Sensor 1

Trouble Code: P0155



HO2S Heater Performance Bank 2 Sensor 1

Trouble Code: P0156



HO2S Performance Bank 2 Sensor 2

Trouble Code: P0157



HO2S Circuit Low Voltage Bank 2 Sensor 2

Trouble Code: P0158



HO2S Circuit High Voltage Bank 2 Sensor 2

Trouble Code: P0160



HO2S Circuit Insufficient Activity Bank 2 Sensor 2

Trouble Code: P0161



HO2S Heater Performance Bank 2 Sensor 2

Trouble Code: P0168



Engine Fuel Over-Temperature

Trouble Code: P0171



Fuel Trim System Lean Bank 1

Possible Causes:



The 5.3L engine, VIN code Z, may use either 100% pure unleaded fuel or unleaded fuel containing up to 85% ethanol, or E85. Refer to Fuel System Description . This DTC can set if the learned alcohol content is not within 15% of the actual alcohol content in the fuel tank. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
 
Excessive resistance in the fuel injector control and/or the ignition 1 voltage circuits may cause the following symptoms:

Misfire
 
Rough idle Refer to DTC P0200 .
 

The system may become lean if an injector is not supplying enough fuel.A lean condition could be present during high fuel demand.Review the Failure Records with a scan tool. If an intermittent condition is suspected, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0172



Fuel Trim System Rich Bank 1

Possible Causes:



The 5.3L engine, VIN code Z, may use either 100% pure unleaded fuel or unleaded fuel containing up to 85% ethanol, or E85. Refer to Fuel System Description . This DTC can set if the learned alcohol content is not within 15% of the actual alcohol content in the fuel tank. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
 
Fuel contamination, such as water, will effect fuel trim.
 
A malfunctioning MAF sensor can cause a rich condition and set this DTC. Refer to DTC P0101 .
 
Review Failure Records with a scan tool. If an intermittent condition is suspected , refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0174



Fuel Trim System Lean Bank 2

Possible Causes:



The 5.3L engine, VIN code Z, may use either 100% pure unleaded fuel or unleaded fuel containing up to 85% ethanol, or E85. Refer to Fuel System Description . This DTC can set if the learned alcohol content is not within 15% of the actual alcohol content in the fuel tank. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
 
Excessive resistance in the fuel injector control and/or the ignition 1 voltage circuits may cause the following symptoms:

Misfire
 
Rough idle Refer to DTC P0200 .
 

The system may become lean if an injector is not supplying enough fuel.A lean condition could be present during high fuel demand.Review the Failure Records with a scan tool. If an intermittent condition is suspected, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0175



Fuel Trim System Rich Bank 2

Possible Causes:



The 5.3L engine, VIN code Z, may use either 100% pure unleaded fuel or unleaded fuel containing up to 85% ethanol, or E85. Refer to Fuel System Description . This DTC can set if the learned alcohol content is not within 15% of the actual alcohol content in the fuel tank. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
 
Fuel contamination, such as water, will effect fuel trim.
 
A malfunctioning MAF sensor can cause a rich condition and set this DTC. Refer to DTC P0101 .
 
Review Failure Records with a scan tool. If an intermittent condition is suspected , refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0181



Fuel Temperature Sensor Performance

Trouble Code: P0191



Fuel Rail Pressure (FRP) Sensor Performance

Trouble Code: P0192



Fuel Rail Pressure (FRP) Sensor Circuit Low Voltage

Trouble Code: P0193



Fuel Rail Pressure (FRP) Sensor Circuit High Voltage

Trouble Code: P0200



Injector Control Circuit

Possible Causes:



Performing the Fuel Injector Coil Test may help to isolate an intermittent condition. Refer to Fuel Injector Coil Test .
 
For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0201



Fuel Injector 1 Control Circuit

Trouble Code: P0202



Fuel Injector 2 Control Circuit

Trouble Code: P0203



Fuel Injector 3 Control Circuit

Trouble Code: P0204



Fuel Injector 4 Control Circuit

Trouble Code: P0205



Fuel Injector 5 Control Circuit

Trouble Code: P0206



Fuel Injector 6 Control Circuit

Trouble Code: P0207



Fuel Injector 7 Control Circuit

Trouble Code: P0208



Fuel Injector 8 Control Circuit

Trouble Code: P0218



Transmission Condition Overtemperature

Possible Causes:



The scan tool Trans. Fluid Temp. should rise steadily to a normal operating temperature, then stabilize.
 
Ask about the customer's driving habits, trailer towing, etc. Trailer towing should occur in D3.
 
Refer to Symptoms - Automatic Transmission .
 

Trouble Code: P0220



Throttle Position (TP) Sensor 2 Circuit

Possible Causes:



Inspect the TAC module connectors for signs of water intrusion. If water intrusion occurs, multiple DTCs may set without any circuit or component conditions found during diagnostic testing.
 
When the TAC module detects a condition within the TAC system, more than one TAC system related DTC may set. This is due to the many redundant tests run continuously on this system. Locating and repairing one individual condition may correct more than one DTC. Disconnecting components during testing may set additional DTCs. Remember this if you review the stored information in Capture Info.
 
If this DTC is determined to be intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0230



Fuel Pump Relay Control Circuit

Trouble Code: P0234



Turbocharger Engine Overboost

Trouble Code: P0299



Turbocharger Engine Underboost

Possible Causes:



A MAP sensor that is stuck at BARO, or is 40 kPa lower than desired while under boost, will cause this DTC to set. Use a scan tool and compare the MAP Sensor parameters to a known good vehicle. Operate both vehicles under various conditions.
 

Trouble Code: P0300



Engine Misfire Detected

Possible Causes:



Excessive vibration from sources other than the engine could cause DTC P0300 to set. The following are possible sources of vibration:

Thickness variation of the brake rotors--Refer to Symptoms - Hydraulic Brakes .
 
The drive shaft not balanced--Refer to Vibration Analysis - Driveline .
 
Worn or damaged accessory drive belt--Refer to Symptoms - Engine Mechanical .
 

There may be more or less cylinders actually misfiring than indicated by the scan tool.Spray water on the secondary ignition components using a spray bottle. Look and listen for arcing or misfiring.If there are multiple misfires on only one bank, inspect the fuel injector and ignition coil, power and ground circuits for that bank. Refer to Engine Controls Schematics .
 

Trouble Code: P0301



Cylinder 1 Misfire Detected

Trouble Code: P0302



Cylinder 2 Misfire Detected

 
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