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Engine running, fuelling and misfires
Air metering, fuelling, ignition, misfire, idle, boost, knock, oxygen sensors and the catalyst, all working together in the running engine.
P0001P0001: the fuel volume regulator circuit isn't reading rightP0002P0002: the fuel volume regulator reading doesn't add upP0003P0003: the fuel volume regulator circuit is reading lowP0004P0004: the fuel volume regulator circuit is reading highP0007P0007: the fuel shut-off valve circuit isn't reading rightP0068P0068: the airflow reading and the throttle position disagreeP0087P0087: the fuel pressure is lower than the computer expectsP0088P0088: the fuel pressure is higher than the computer expectsP0093P0093: the fuel system has detected a large leakP0094P0094: the fuel system has detected a small leakP0100P0100: the airflow sensor circuit has a faultP0101P0101: the airflow sensor reading doesn't add upP0102P0102: the airflow sensor signal is reading too lowP0103P0103: the airflow sensor signal is reading too highP0104P0104: the airflow sensor circuit cuts in and outP0105P0105: the manifold pressure sensor circuit has a faultP0106P0106: the manifold pressure sensor reading doesn't add upP0107P0107: the manifold pressure sensor signal is reading too lowP0108P0108: the manifold pressure sensor signal is reading too highP0109P0109: the manifold pressure sensor circuit cuts in and outP0110P0110: the intake air temperature sensor circuit has a faultP0111P0111: the intake air temperature reading doesn't add upP0112P0112: the intake air temperature signal is reading too lowP0114P0114: the intake air temperature circuit cuts in and outP0120P0120: the throttle position sensor circuit has a faultP0121P0121: the throttle position sensor reading doesn't add upP0122P0122: the throttle position sensor signal is reading too lowP0123P0123: the throttle position sensor signal is reading too highP0124P0124: the throttle position sensor circuit cuts in and outP0130P0130: the front oxygen sensor circuit has a faultP0131P0131: the front oxygen sensor signal is reading too lowP0132P0132: the front oxygen sensor signal is reading too highP0133P0133: the front oxygen sensor is responding too slowlyP0134P0134: the front oxygen sensor isn't responding at allP0135P0135: the front oxygen sensor's heater circuit has a faultP0136P0136: the rear oxygen sensor circuit has a faultP0137P0137: the rear oxygen sensor signal is reading too lowP0138P0138: the rear oxygen sensor signal is reading too highP0139P0139: the rear oxygen sensor is responding too slowlyP0140P0140: the rear oxygen sensor isn't responding at allP0141P0141: the rear oxygen sensor's heater circuit has a faultP0150P0150: bank 2's front oxygen sensor circuit has a faultP0151P0151: bank 2's front oxygen sensor signal is reading too lowP0152P0152: bank 2's front oxygen sensor signal is reading too highP0153P0153: bank 2's front oxygen sensor is responding too slowlyP0154P0154: bank 2's front oxygen sensor isn't responding at allP0155P0155: bank 2's front oxygen sensor heater circuit has a faultP0170P0170: the fuel trim system on bank 1 isn't behaving correctlyP0171P0171: your engine is running leanP0172P0172: your engine is running richP0173P0173: the fuel trim system on bank 2 isn't behaving correctlyP0174P0174: bank 2 of your engine is running leanP0175P0175: bank 2 of your engine is running richP0190P0190: the fuel rail pressure sensor circuit has a faultP0191P0191: the fuel rail pressure reading doesn't add upP0192P0192: the fuel rail pressure sensor circuit is reading lowP0193P0193: the fuel rail pressure sensor circuit is reading highP0194P0194: the fuel rail pressure sensor circuit cuts in and outP0234P0234: the turbo or supercharger is building too much boostP0263P0263: cylinder 1 isn't contributing its share of powerP0299P0299: the turbo or supercharger isn't building enough boostP0300P0300: the engine is misfiring on more than one cylinderP0301P0301: cylinder 1 is misfiringP0302P0302: cylinder 2 is misfiringP0303P0303: cylinder 3 is misfiringP0304P0304: cylinder 4 is misfiringP0305P0305: cylinder 5 is misfiringP0306P0306: cylinder 6 is misfiringP0309P0309: cylinder 9 is misfiringP0325P0325: the knock sensor circuit has a faultP0326P0326: the knock sensor reading doesn't add upP0327P0327: the knock sensor signal is reading too lowP0328P0328: the knock sensor signal is reading too highP0335P0335: the crankshaft position sensor circuit has a faultP0336P0336: the crankshaft position sensor reading doesn't add upP0337P0337: the crankshaft position sensor signal is reading too lowP0338P0338: the crankshaft position sensor signal is reading too highP0340P0340: the camshaft position sensor circuit has a faultP0341P0341: the camshaft position sensor reading doesn't add upP0342P0342: the camshaft position sensor signal is reading too lowP0343P0343: the camshaft position sensor signal is reading too highP0345P0345: bank 2's camshaft position sensor circuit has a faultP0350P0350: an ignition coil circuit has a faultP0400P0400: the exhaust recirculation system has a flow faultP0401P0401: not enough exhaust is being fed back into the engineP0402P0402: too much exhaust is being fed back into the engineP0403P0403: the exhaust recirculation valve's circuit has a faultP0404P0404: the exhaust recirculation valve reading doesn't add upP0405P0405: the EGR position sensor signal is reading too lowP0406P0406: the EGR position sensor signal is reading too highP0407P0407: the EGR system's second position sensor is reading too lowP0408P0408: the EGR system's second position sensor is reading too highP0420P0420: the catalytic converter isn't cleaning up well enoughP0421P0421: the warm-up catalyst isn't cleaning up well enoughP0430P0430: bank 2's catalytic converter isn't cleaning up well enoughP0431P0431: bank 2's warm-up catalyst isn't cleaning up well enoughP0505P0505: the idle air control system has a faultP0506P0506: the engine is idling slower than the computer wantsP0507P0507: the idle speed is higher than it should beP2177P2177: your engine is running lean off idleP2178P2178: your engine is running rich off idleP2179P2179: bank 2 is running lean off idleP2180P2180: bank 2 is running rich off idleP2187P2187: your engine is running lean at idleP2188P2188: your engine is running rich at idleP2189P2189: bank 2 is running lean at idleP2190P2190: bank 2 is running rich at idle