Question about 2005 Dodge Magnum

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Check engine light

After the check engine light came on yesterday my car is using 3x the fuel....why?

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Two reasons.
One, the reason the warning light is on is to tell the driver the engine computer has found a problem with the performance or emissions which could damage the catalytic converter. So you need to get the computer scanned for trouble codes as soon as you can.
Second, when the warning light is on, the engine is running in "safe mode" and is not using all of the sensor readings, so you won't get the best performance in that situation.

Posted on Jul 16, 2013

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Posted on Jan 02, 2017

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Our 1999 Buick century is having problems with running it won't hardly take gas and the transmission won't shift up sometimes the same time the transmission messed up the speedometer quit working


Is the check engine light on ? Have checked for codes , may have transmission codes stored . Check engine light doesn't need to be on for codes to be stored . VSS - vehicle speed sensor is a input to PCM.
The Vehicle Speed Sensor (VSS) is a gear-driven permanent magnet generator housed in the transaxle. The sensor generates a sine wave output with a frequency proportional to the vehicle speed. The Powertrain Control Module (PCM) converts the signal to an output that switches to ground at a frequency of 4000 pulses per mile. The signal (CKT 817) is used by various vehicle components. The signal CKT 817 drives the following components:
• The speedometer
• The odometer May also have problems with mass air flow sensor , crankshaft position sensor , cam sensor etc...
DTC P0336 Crankshaft Position (CKP) Sensor Circuit
The 24X reference signal is used to improve idle spark control at low engine speeds. The PCM uses the 24X reference signal to calculate engine RPM and crankshaft position at engine speeds below 1600 RPM. The PCM constantly monitors the number of pulses on the 24X reference circuit and compares the number of 24X reference pulses to the number of 3X reference pulses and CAM signal pulses being received. If the PCM receives an incorrect number of pulses on the 24X reference circuit, DTC P0336 will set and the PCM will use the 3X reference signal circuit for fuel and ignition control. The engine will continue to start and run using the 3X reference and CAM signals only.
There are a lot of electronic thing's on you Buick that can go haywire causing the problems you have . If you are unfamiliar with these thing's I mentioned , I suggest you take it to a ASE certified repair shop . Some people get irate just mentioning this, It mite save you money in the long run .

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Sometimes it won't idle have to drive with two feet


You could have major vacuum leak or a problem with the IAC - idle air control motor . Is your vehicles check engine light on ?
Fuel System
?€¢
Test the fuel system circuits for proper operation. Refer to Fuel Pump Electrical Circuit Diagnosis .


?€¢
Test for low fuel pressure. Refer to Fuel System Diagnosis .


?€¢
Test for faulty fuel injectors. Refer to Fuel Injector Balance Test with Special Tool , Fuel Injector Balance Test with Tech 2 , Fuel Injector Solenoid Coil Test test procedures.


?€¢
Inspect for fuel contamination. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .


?€¢
Inspect for fuel in the pressure regulator vacuum hose.


?€¢
Ensure each injector harness is connected to the correct injector/cylinder.


?€¢
Inspect for any items which may cause an engine to run rich, long term fuel trim is significantly in the negative range. Refer to Diagnostic Aids for DTC P0172.


?€¢
Inspect for any items which may cause an engine to run lean, long term fuel trim is significantly in the positive range. Refer to Diagnostic Aids for DTC P0171.


Sensor/System
?€¢
Test for conditions which cause an incorrect idle speed.


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Throttle body tampering, excessive deposits, or damage--Refer to Fuel System Description .


-
Restricted air intake system


-
Large vacuum leak


?€¢
Inspect the air intake ducts for being collapsed, damaged areas, looseness, improper installation, or leaking especially between the mass air flow (MAF) sensor and the throttle body.


?€¢
Inspect crankcase ventilation valve for proper operation.


?€¢
Inspect the throttle position (TP) sensor and related wiring. Refer to DTC P0123 .


?€¢
Monitor the 24X crankshaft position (CKP) and camshaft position (CMP) sensors on scan tool. If both are not responding, test the sensor feed circuit. Both sensors use a separate feed circuit but are internally connected to power. Test all 24X and CMP sensor circuits for intermittents. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.


?€¢
Monitor the 3X parameter on the scan tool. If the 3X is not responding, inspect the 7X CKP sensor and circuits for intermittents. Inspect the ignition control (IC) circuit, bypass circuit, 3X reference high circuit, and the 3X reference low circuit for intermittents. If these circuits become open, or shorted may not set a DTC immediately, but are capable of causing driveability complaints. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.


?€¢
Test the exhaust gas recirculation (EGR) system for proper operation. Refer to Exhaust Gas Recirculation (EGR) System Description .


?€¢
Inspect the Transaxle Range Switch input with the vehicle in drive and the gear selector in drive or overdrive.

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2006 Cobalt - Brown thick sludge on dipstick


If the oil level (checked with the dipstick) is VERY high, and the oi on the dipstick looks like chocolate milk (or just after running, foamy chocolate milk), this usually means either the head gasket is blown, or the cylinder head or the engine block is cracked, allowing the engine coolant to mix with the engine oil.

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if you have'nt replaced those spark plugs and wires lately, you need to.and also, lucas fuel treatment, in my personal opinion,is the very best for unclogging fuel lined and injectors.it being below a 1999 model and your check engine light is on, you can have it coderead for free if you're near anautozone or advance automotive parts store. they will code read it and tell you why that check engine lights coming on.hope this helps and thank you for choosing fixya.com

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Engine ligh is on, Overdrive light blinks on


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