Equinox 2005-2007, Torrent 2006-07

3.4L V6 VIN F Auto 2

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Trouble Code: P0120



Throttle Position (TP) Sensor 1 Circuit

Trouble Code: P0120



Throttle Position (TP) Sensor Circuit

Trouble Code: P0121



Throttle Position (TP) Sensor Performance

Trouble Code: P0122



Throttle Position (TP) Sensor 1 Circuit Low Voltage

Trouble Code: P0123



Throttle Position (TP) Sensor 1 Circuit High Voltage

Trouble Code: P0125



Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control

Trouble Code: P0128



Engine Coolant Temperature (ECT) Below Thermostat Regulations Temperature

Trouble Code: P0128



Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature

Possible Causes:



DTC P0128 occurring with insufficient vehicle interior heating is an indication of improper thermostat operation.
 
Inspect the ECT sensor terminals and the ECT harness connector for corrosion. This condition results in a greater voltage on the ECT sensor signal circuit, which is interpreted by the ECM as a colder ECT.
 
This diagnostic runs in a specific range. Measure and record the resistance of the ECT sensor at various ambient temperatures between -7 to +80°C (+19 to +176°F), then compare those measurements to the Temperature vs Resistance table. Refer to Temperature Versus Resistance .
 
A slight to moderate resistance in the ECT sensor signal circuit or low reference circuit will affect this diagnostic. This condition results in a greater voltage on the ECT sensor signal circuit, which is interpreted by the ECM as a colder ECT.
 

Trouble Code: P0131



HO2S Circuit Low Voltage Bank 1 Sensor 1

Trouble Code: P0131



HO2S Circuit Low Voltage Sensor 1

Trouble Code: P0132



HO2S Circuit High Voltage Bank 1 Sensor 1

Trouble Code: P0132



HO2S Circuit High Voltage Sensor 1

Trouble Code: P0133



HO2S Slow Response Bank 1 Sensor 1

Trouble Code: P0133



HO2S Slow Response Sensor 1

Trouble Code: P0134



HO2S Insufficient Activity Bank 1 Sensor 1

Trouble Code: P0134



HO2S Circuit Insufficient Activity Sensor 1

Trouble Code: P0135



HO2S Heater Performance Bank 1 Sensor 1

Trouble Code: P0135



HO2S Heater Performance Sensor 1

Possible Causes:



When using a high impedance, low current draw, test lamp to load the heater circuit, the test lamp flash may be dim, the scan tool Heater Command parameter may indicate 7 percent, and the Heater parameter may indicate 0 amps. This is a normal condition.
 

Trouble Code: P0137



HO2S Circuit Low Voltage Bank 1 Sensor 2

Possible Causes:



This DTC may set due to poor idle characteristics. A possible cause may be uncontrolled fueling due to an open or high resistance in the HO2S 1 low signal circuit. Before replacing any component, ensure that this condition does not exist.
 

Trouble Code: P0137



HO2S Circuit Low Voltage Sensor 2

Trouble Code: P0138



HO2S Circuit High Voltage Bank 1 Sensor 2

Trouble Code: P0138



HO2S Circuit High Voltage Sensor 2

Trouble Code: P0140



HO2S Circuit Insufficient Activity Bank 1 Sensor 2

Trouble Code: P0140



HO2S Circuit Insufficient Activity Sensor 2

Trouble Code: P0141



HO2S Heater Performance Bank 1 Sensor 2

Trouble Code: P0141



HO2S Heater Performance Sensor 2

Possible Causes:



When using a high impedance, low current draw, test lamp to load the heater circuit, the test lamp flash may be dim, the scan tool Heater Command parameter may indicate 7 percent, and the Heater parameter may indicate 0 amps. This is a normal condition.
 

Trouble Code: P0171



Fuel Trim System Lean Bank 1

Possible Causes:



The system will go lean if an injector is not providing enough fuel.
 
A lean condition could be present during high fuel demand due to a fuel pump that does not pump enough fuel.
 
Excessive resistance in the ignition 1 voltage and/or the fuel injector circuits may cause the following symptoms:

A lean condition
 
Misfire
 
Rough idle
 

Fuel contamination, such as water and alcohol, will effect the fuel trim.This DTC may set due to poor idle characteristics. A possible cause may be uncontrolled fueling due to an open or high resistance in the HO2S 1 low signal circuit. Before replacing any component, ensure that this condition does not exist.
 

Trouble Code: P0171



Fuel Trim System Lean Bank 1

Possible Causes:



A malfunctioning MAF sensor can cause a lean condition and set this DTC.
 
A lean condition could be present due to air leaks in the air induction system and related components.
 
The system will go lean if an injector is not providing enough fuel.
 
A lean condition could be present during high fuel demand due to a fuel pump that does not pump enough fuel.
 
Excessive resistance in the ignition 1 voltage and/or the fuel injector circuits may cause the following symptoms:

A lean condition
 
Misfire
 
Rough idle
 

Fuel contamination, such as water and alcohol, will effect the fuel trim.This DTC may set due to poor idle characteristics. A possible cause may be uncontrolled fueling due to an open or high resistance in the HO2S 1 low signal circuit. Before replacing any component, ensure that this condition does not exist.
 

Trouble Code: P0171



Fuel Trim System Lean Bank 1

Possible Causes:



On vehicles equipped with a vacuum brake booster, rapid brake pedal cycling may imitate a vacuum leak.
 

Trouble Code: P0172



Fuel Trim System Rich Bank 1

Possible Causes:



A malfunctioning MAF sensor can cause a rich condition and set this DTC.
 
If an intermittent condition is suspected , refer to Testing for Intermittent Conditions and Poor Connections .
 
This DTC may set due to poor idle characteristics. A possible cause may be uncontrolled fueling due to an open or high resistance in the HO2S 1 low signal circuit. Before replacing any component, ensure that this condition does not exist.
 

Trouble Code: P0172



Fuel Trim System Rich Bank 1

Possible Causes:



On vehicles equipped with a vacuum brake booster, rapid brake pedal cycling may imitate a vacuum leak.
 

Trouble Code: P0201



Injector 1 Control Circuit

Possible Causes:



A cylinder that is misfiring can also cause the misfire current counters to increment for another cylinder. Diagnose the cylinder with the highest level of misfire first.
 
Performing the Fuel Injector Coil test may help to isolate an intermittent condition. Refer to Fuel Injector Coil Test .
 
If the condition is intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0201



Injector 1 Control Circuit

Possible Causes:



A cylinder that is misfiring can also cause the misfire current counters to increment for another cylinder. Diagnose the cylinder with the highest level of misfire first.
 
Performing the Fuel Injector Coil test may help to isolate an intermittent condition. Refer to Fuel Injector Diagnosis .
 
If the condition is intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0201



Injector 1 Control Circuit

Possible Causes:



Performing the Fuel Injector Diagnosis may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis .
 

Trouble Code: P0202



Injector 2 Control Circuit

Possible Causes:



A cylinder that is misfiring can also cause the misfire current counters to increment for another cylinder. Diagnose the cylinder with the highest level of misfire first.
 
Performing the Fuel Injector Coil test may help to isolate an intermittent condition. Refer to Fuel Injector Coil Test .
 
If the condition is intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0202



Injector 2 Control Circuit

Possible Causes:



A cylinder that is misfiring can also cause the misfire current counters to increment for another cylinder. Diagnose the cylinder with the highest level of misfire first.
 
Performing the Fuel Injector Coil test may help to isolate an intermittent condition. Refer to Fuel Injector Diagnosis .
 
If the condition is intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0202



Injector 2 Control Circuit

Possible Causes:



Performing the Fuel Injector Diagnosis may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis .
 

Trouble Code: P0203



Injector 3 Control Circuit

Possible Causes:



A cylinder that is misfiring can also cause the misfire current counters to increment for another cylinder. Diagnose the cylinder with the highest level of misfire first.
 
Performing the Fuel Injector Coil test may help to isolate an intermittent condition. Refer to Fuel Injector Coil Test .
 
If the condition is intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0203



Injector 3 Control Circuit

Possible Causes:



A cylinder that is misfiring can also cause the misfire current counters to increment for another cylinder. Diagnose the cylinder with the highest level of misfire first.
 
Performing the Fuel Injector Coil test may help to isolate an intermittent condition. Refer to Fuel Injector Diagnosis .
 
If the condition is intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0203



Injector 3 Control Circuit

Possible Causes:



Performing the Fuel Injector Diagnosis may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis .
 

 
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