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Solution for code P0642 - 2006 Audi A3

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My HHR keeps setting the p0193 code. The symptoms are intermittent start and stall, run rough while stopped idling and starts, runs rough, stalls the restarts like nothing happened. and


This code refers to the fuel rail pressure sensor circuit being high. The two most common problems of this code are a faulty sensor and/or faulty pressure regulator. A wiring/computer issue can also contribute to this code. I have had success with numerous vehicles displaying this code by changing the fuel pressure sensor and correcting the problems you have stated

Jan 27, 2016 | 2009 Chevrolet HHR

1 Answer

REsolving the P0642 code


reset the comp, always go to the first code, this code can cause more codes to register

Sep 23, 2014 | Cars & Trucks

1 Answer

07 passat code p0642 related to other codes


code p0642 refers to ECM-knock control defective or sensor reference voltage A circuit low or system voltage- malfunction===causes for ecm is ECM--- for voltage A wiring is short to positive --- for system voltage ---wiring--poor connection--battery---alternator
code p2014 refers to intake manifold air control actuator position sensor/ switch bank 1 circuit malfunction=== causes --wiring --intake manifold air control actuator position sensor/switch
code p0106 refers to manifold absolute pressure MAP sensor/barometric pressure sensor-range/performance problem===causes--intake /exhaust leak--wiring--MAP sensor---Baro sensor.
code p0089 refers to fuel pressure regulator --performance problem===causes--fuel pressure regulator--mechanical fault. I would suggest that you have the battery load tested and the alternator checked for correct output as it may be the common reason for the codes .P0089 will not be electrical as it being a mechanical fault then the regulator needs replacing

Jul 23, 2013 | Cars & Trucks

1 Answer

Engine codes p0642 and p0451


P0451 Evaporative Emission Control System Pressure Sensor Range/Performance

P0642 Engine Control Module (ECM) Knock Control -Defective
i think the most likely cause is the anti knock sensor ,this is mainly fitted to american models rather than europeon models owing to the europeon parliament disallowing the high level of biological produced fuel used in america,the answer o this i think is to see the post i have added to this questions answer.

Nov 20, 2012 | Cars & Trucks

1 Answer

Crank but does not start (Error code P0642)


p0642 = sensor reference voltage a circuit low voltage
p0300 = means random misfire
check firing order connections and must be in place.
check also cables especially the high tension cable and coils for required resistance.
primary = 1.0 to 0.5 ohms
secondary = 900 to 11,000 ohms (as requires per model)

Aug 15, 2012 | Infiniti Cars & Trucks

2 Answers

I m accelaret the car but rpm not go on 2000 abou


it wont rev over 2000 rpms?? if that is what you are trying to say, it sounds like you have a clogged catalatic converter.

Jun 28, 2011 | 1997 Honda Odyssey

1 Answer

I have a 06 dodge ram 2500 diesel. I have 4 codes that came on. Code P0107 map sensor low, P0642 Sensor ref. voltage 1 circuit low, P0480 colling fan 1control circuit low, and P0483 fan speed, I went a...


Check for a shorted wire harness laying on top of the a/c compressor line down by the compressor. The harness will sometimes lay on the line and wear through shorting out the 5 volt reference.

Apr 16, 2011 | Dodge Ram 2500 Cars & Trucks

1 Answer

I have a 2008 VW Passat. When the engine light came on I stopped at Autozone and they gave me the following codes: P0089, P0642, P2004. Anyone know what they mean?


CODE 89 IS FUEL PRESSURE REGULATOR 1 PERFORMANCE.CODE 642 SENSOR REFERANCE VOLTAGE CIRCUIT "A" LOW.AND CODE 2004 IS ITAKE MANIFOLD RUNNER CONTROL STUCK OPEN.CK FOR BAD OR MISSING VACUUM LINES.IS IT STILL UNDER WARRANTY

May 05, 2009 | 2008 Volkswagen Passat Sedan

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