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P0331 Code on 200 Pontiac - Grand Prix Pontiac Cars & Trucks

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P0331 Spark Knock has not been sensed

The spark knock or ping is 2 flame fronts colliding in the combustion chamber, the shock wave of which can eventually blow holes through the piston crowns if severe enough. In late model engines the causes can include:
- fuel octane too low
- EGR system malfunction
- knock sensor (if equipped) malfunction
- PCM software not retarding ignition timing as required
- high engine operating temperature
- lean fuel mixture
- carbon deposits on piston crowns/combustion chambers

Hope helps.

Posted on Aug 20, 2010

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Posted on Jan 02, 2017

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Trouble codes


Hi Sandra!
The trouble codes listed are defined as:

P0141 Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

P0300 Random/Multiple Cylinder Misfire Detected

P0331 Knock Sensor 2 Circuit Range/Performance (Bank 2)

PO300 & PO331 are possibly symptomatic of issues caused by PO141, which would have a direct influence on the air/fuel mxture... which could cause missing and knocking.

So the first thing I would try is replacing the Bank 2 Oxygen Sensor, after making sure the wiring and connections to that sensor are in good shape.

Does the engine show any physical issues such as loosing coolant, smoking exhaust, overheating? A blown or leaking head gasket on the #2 bank could also present these (among other)
codes.

Good luck and let me know how it goes!

WB

Jun 09, 2008 | 1997 Pontiac Grand Am

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