C3781 Pontiac G8 DTC Code

Pontiac G8 Engine Specifications:

Engine Type :	Single Cylinder Engine
Cylinder Type :	Opposite Piston Engine
Engine Air Intake Process :	Naturally Aspirated

Your Pontiac G8 engine control system detects a problem, the computer stores the diagnostic trouble code C3781 in its memory. To figure out what is wrong with your vehicle you must first extract the C3781 DTC For Pontiac G8.

To solve C3781 Pontiac G8 problem, you'll have to remove the muffler, crankcase and other components blocking the valve chamber. Then, remove the cylinder head bolts (label for easy re-installation) Adjust the jaws of the valve spring compressor until they touch the top and bottom of the valve chamber Push the tool in to compress the spring and tighten the jaws Remove the retainers and lift out the valves , compressors and springs

C3781 Pontiac G8 DTC Meaning

C	Chassis Code - Problem is controller area network wiring bus and modules.
3	SAE - Generic
7	Ignition System Or Misfire
8	Crankshaft Position Sensor Circuit Performance
1	PCM Stack Overrun

If your vehicle failed a C3781 Pontiac G8 test and the C3781 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses C3781 a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look C3781 DTC For Pontiac G8: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression.