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America!
Corvette C6
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Discussion Starter #1
As title states had detroit d look it up and clear it once four days later it came back on. It is 6degreeshere right now. Any ideas let me know thx
 

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TrailblazerSS
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1,492 Posts
Needs tp sensor which is only serviced as throttlebody, its a pretty common issue.
 

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Bet you cant tell
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P0121

DTC P0121 is a Type B DTC.

Conditions for Clearing the MIL/DTC



DTC P0068 is a Type A DTC.
DTC P0121 is a Type B DTC.
Circuit/System Testing



Inspect for the following conditions:
Vacuum hoses for splits, kinks, and proper connections as shown on Vehicle Emission Control Information label
Inspect thoroughly for any type of leak or restriction
Air leaks at throttle body mounting area and intake manifold sealing surfaces
Inspect throttle body for dirt, debris, and coking.
Allow the engine to reach operating temperature. Observe the Manifold Absolute Pressure (MAP) Sensor Voltage parameter with a scan tool. Voltage should be more than 0.8 volt and less than 4 volts .
¤ If more than 4 volts or less than 0.8 volt , refer to DTC P0106. See: P0106

Idle the engine. Observe the MAP Sensor kPa parameter with a scan tool. Increase the engine speed slowly and then back to idle. The MAP sensor kPa should change smoothly and gradually as engine speed is increased and returned to idle.
¤ If the MAP sensor kPa does not change refer to DTC P0106.See: P0106

Take a snapshot of the engine data list while performing the actions listed below. The mass air flow (MAF) sensor kPa should change smoothly and gradually as the engine speed is increased and is returned to idle.
Idle the engine.
Increase the engine speed slowly to 3,000 RPM , then back to idle.
Exit from the snapshot and review the data.
Observe the Mass Air Flow (MAF) Sensor parameter frame by frame with a scan tool. The MAF sensor kPa should change smoothly and gradually as the engine speed is increased and is returned to idle.
¤ If the MAF sensor kPa does not change smoothly and gradually as the engine speed is increased and is returned to idle refer to DTC P0101 or P1101. See: P0101 See: P1101

Inspect the throttle body for the following conditions:
Loose or damaged throttle blade
Broken throttle shaft
Any throttle body damage
¤ If any of these conditions exist, replace the throttle body assembly
 

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TrailblazerSS
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178 Posts
clean ur throttle body real good, when its real cold like that and carbon makes it stick, i would try cleaning it before spending $ to replace it.
 

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America!
Corvette C6
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2,827 Posts
Discussion Starter #5
ok ill have to wait til it warms up.. its been like 0-12 degrees for the last week
 
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