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Chevrolet Silverado / GMC Sierra. Manual - part 2514
Control Module References for ECM replacement, setup and programming.
DTC P0806
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic approach.
Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC P0806
Clutch Pedal Position (CPP) Sensor Circuit Performance
Diagnostic Fault Information
Typical Scan Tool Information
CPP Sensor Voltage
CPP Sensor Percentage
Circuit
Short to
Ground
Open/High
Resistance
Short to
Voltage
Signal
Performance
CPP Sensor Signal
P0807
P0807
P0808
P0806
CPP Sensor 5-Volt Reference
P0651,
P0807
P0807
P0651,
P0808
-
CPP Sensor Low Reference
-
P0808
P0808
-
Circuit
Short to
Ground
Open
Short to
Voltage
Operating Conditions: Ignition ON.
CPP Sensor Voltage Parameter Normal Range: 0-volts with clutch pedal applied to 5-volts
when clutch pedal is released.
CPP Sensor 5-Volt Reference
0 volts
0 volts
5 volts
CPP Sensor Signal
0 volts
0 volts
5 volts
CPP Sensor Low Reference
-
5 volts
-
Circuit
Short to
Ground
Open
Short to
Voltage
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Manual Transmission - Tremec 5-Speed (M96) - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
Circuit/System Description
The clutch pedal position (CPP) sensor is a three wire sensor, connected to a 5-volt reference
circuit, a low reference circuit, and a signal circuit. The engine control module (ECM) supplies
5-volts to the CPP sensor, and also provides a sensor ground path on the low reference circuit.
The CPP sensor sends a voltage signal to the ECM on the signal circuit. The voltage on the signal
circuit will vary from a voltage less than or equal to 5-volts when the clutch pedal is released, to a
voltage less than or equal to 1.5-volt when the clutch pedal is applied.
Conditions for Running the DTC
DTCs P0335, P0336, P0502, P0503, P0607, P0808, or P080A are not set.
Conditions for Setting the DTC
The CPP sensor is stuck in range.
Action Taken When the DTC Sets
P0806 is a Type A DTC.
Conditions for Clearing the MIL/DTC
P0806 is a Type A DTC.
Reference Information
Schematic Reference
PSD SIE TITLE Error: SIE linked to empty Cell ID 168122
Connector End View Reference
Component Connector End Views
Description and Operation
Operating Conditions: Ignition ON.
CPP Sensor Percent Parameter Normal Range: 0% with clutch pedal released to 100%
when clutch pedal is applied.
CPP Sensor 5-Volt Reference
100%
100%
0-100%
CPP Sensor Signal
100%
100%
100%
CPP Sensor Low Reference
-
0%
-
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Manual Transmission - Tremec 5-Speed (M96) - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
Manual Transmission Description and Operation
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information.
Circuit/System Verification
1. Ignition ON, observe the scan tool CPP sensor percent parameter. The percentage should
vary from 0% when the clutch pedal is released, to 100% when the clutch pedal is in the
apply position.
2. Perform the CPP learn procedure. Refer to Clutch Pedal Position Sensor Learn.
3. Operate the vehicle within the conditions for running the DTC to verify the DTC does not
reset. You may also operate the vehicle within the conditions that you observed from the
Freeze Frame/Failure Records data.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector of the CPP sensor.
2. Ignition ON, observe the scan tool CPP sensor voltage parameter for 0.1-volt.
If the voltage is below the specified value, replace the CPP sensor.
If the voltage is above the specified value, replace the ECM.
Component Testing
1. Ignition OFF, disconnect the harness connector of the CPP sensor.
2. Measure the resistance between the signal terminal B and the low reference terminal A of
the CPP sensor. Sweep the CPP sensor through the entire range. The resistance should vary
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Manual Transmission - Tremec 5-Speed (M96) - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
low to high and high to low without any spikes or dropouts.
If the resistance is erratic with spikes or dropouts, replace the CPP sensor.
Repair Procedures
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Clutch Pedal Replacement
Control Module References for ECM replacement, setup and programming
DTC P0807 OR P0808
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic approach.
Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC P0807
Clutch Pedal Position (CPP) Sensor Circuit Low Voltage
DTC P0808
Clutch Pedal Position (CPP) Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Information
CPP Sensor Voltage
Circuit
Short to
Ground
Open/High
Resistance
Short to
Voltage
Signal
Performance
CPP Sensor Signal
P0807
P0807
P0808
P0806
CPP Sensor 5-Volt Reference
P0651,
P0807
P0807
P0651,
P0808
-
CPP Sensor Low Reference
-
P0808
P0808
-
Short to
Short to
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Manual Transmission - Tremec 5-Speed (M96) - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
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