07 Tahoe- Code B0163
 

Not able to retieve any info on the Tech 2 for this code. Hardly any info available. Can anyone PLEASE help?
Thanks!

Welcome to the forum.

According to the factory service manual, it is the psgr cmpt temp sensor 1 circuit and is set by the HVAC module. Hope this helps.

I couldn't find the B163 but found these and they are similar in description as 73sharks, they may help narrow the troubleshooting...

DTC B0159 Outside Air Temperature Sensor Circuit Range/Performance
DTC B0164 Passenger Compartment Temperature Sensor #1 (Single Sensor or LH) Circuit Range/Performance

The numbers below refer to the step numbers on the diagnostic table.

1. [*]

<TABLE width="95%" border=1><TBODY><TR><TH vAlign=bottom align=middle>Step
</TH><TH vAlign=bottom align=middle>Action
</TH><TH vAlign=bottom align=middle>Value(s)
</TH><TH align=middle>Yes
</TH><TH align=middle>No
</TH></TR><TR><TD vAlign=bottom align=left colSpan=5>Schematic Reference: HVAC Schematics
Connector End View Reference: HVAC Connector End Views
Sensor Resistance Table: Sensor Resistance Table
</TD></TR><TR><TD vAlign=center align=middle>1
</TD><TD vAlign=top align=left>Did you perform the Diagnostic System Check - Vehicle?
</TD><TD vAlign=center align=middle>--
</TD><TD vAlign=bottom align=middle>Go to Step 2
</TD><TD vAlign=bottom align=left>Go to Diagnostic System Check - Vehicle
</TD></TR><TR><TD vAlign=center align=middle>2
</TD><TD vAlign=top align=left>

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, observe the appropriate Duct Actual parameter in the Heating and Air Conditioning data list.

Does the scan tool indicate that the Duct Actual parameter is within the specified range?
</TD><TD vAlign=center align=middle>5-250 Counts
</TD><TD vAlign=bottom align=left>Go to Testing for Intermittent Conditions and Poor Connections
</TD><TD vAlign=bottom align=middle>Go to Step 3
</TD></TR><TR><TD vAlign=center align=middle>3
</TD><TD vAlign=top align=left>

1. Turn OFF the ignition.
2. Disconnect the appropriate air temperature sensor.
3. Turn ON the ignition, with the engine OFF.
4. With a scan tool, observe the appropriate Duct Actual data parameter.

Does the scan tool indicate that the Duct Actual data parameter is greater than the specified value?
</TD><TD vAlign=center align=middle>250 Counts
</TD><TD vAlign=bottom align=middle>Go to Step 4
</TD><TD vAlign=bottom align=middle>Go to Step 5
</TD></TR><TR><TD vAlign=center align=middle>4
</TD><TD vAlign=top align=left>

1. Turn OFF the ignition.
2. Connect a 3-amp fused jumper wire between the signal circuit of the air temperature sensor and the low reference circuit of the air temperature sensor.
3. Turn ON the ignition, with the engine OFF.
4. With a scan tool, observe the appropriate Duct Actual data parameter.

Does the scan tool indicate that the Duct Actual data parameter is less than the specified value?
</TD><TD vAlign=center align=middle>5 Counts
</TD><TD vAlign=bottom align=middle>Go to Step 8
</TD><TD vAlign=bottom align=middle>Go to Step 6
</TD></TR><TR><TD vAlign=center align=middle>5
</TD><TD vAlign=top align=left>Test the appropriate signal circuit of the air temperature sensor for a short to ground. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
</TD><TD vAlign=center align=middle>--
</TD><TD vAlign=bottom align=middle>Go to Step 12
</TD><TD vAlign=bottom align=middle>Go to Step 9
</TD></TR><TR><TD vAlign=center align=middle>6
</TD><TD vAlign=top align=left>Test the signal circuit of the appropriate air temperature sensor for a short to voltage, a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
</TD><TD vAlign=center align=middle>--
</TD><TD vAlign=bottom align=middle>Go to Step 12
</TD><TD vAlign=bottom align=middle>Go to Step 7
</TD></TR><TR><TD vAlign=center align=middle>7
</TD><TD vAlign=top align=left>Test the low reference circuit of the appropriate air temperature sensor for a high resistance or an open. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
</TD><TD vAlign=center align=middle>--
</TD><TD vAlign=bottom align=middle>Go to Step 12
</TD><TD vAlign=bottom align=middle>Go to Step 9
</TD></TR><TR><TD vAlign=center align=middle>8
</TD><TD vAlign=top align=left>Inspect for poor connections at the harness connector of the appropriate air temperature sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
</TD><TD vAlign=center align=middle>--
</TD><TD vAlign=bottom align=middle>Go to Step 12
</TD><TD vAlign=bottom align=middle>Go to Step 10
</TD></TR><TR><TD vAlign=center align=middle>9
</TD><TD vAlign=top align=left>Inspect for poor connections at the harness connector of the HVAC control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
</TD><TD vAlign=center align=middle>--
</TD><TD vAlign=bottom align=middle>Go to Step 12
</TD><TD vAlign=bottom align=middle>Go to Step 11
</TD></TR><TR><TD vAlign=center align=middle>10
</TD><TD vAlign=top align=left>Replace the air temperature sensor. Refer to the appropriate replacement procedure:
Did you complete the replacement?
</TD><TD vAlign=center align=middle>--
</TD><TD vAlign=bottom align=middle>Go to Step 12
</TD><TD vAlign=center align=middle>--
</TD></TR><TR><TD vAlign=center align=middle>11
</TD><TD vAlign=top align=left>Replace the HVAC control module. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?
</TD><TD vAlign=center align=middle>--
</TD><TD vAlign=bottom align=middle>Go to Step 12
</TD><TD vAlign=center align=middle>--
</TD></TR><TR><TD vAlign=center align=middle>12
</TD><TD vAlign=top align=left>

1. Use the scan tool in order to clear the DTCs.
2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?
</TD><TD vAlign=center align=middle>--
</TD><TD vAlign=bottom align=middle>Go to Step 2
</TD><TD vAlign=bottom align=middle>System OK
</TD></TR></TBODY></TABLE>

it can get a little complicated but here you go.