Question about 1999 Toyota Camry

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The engine check' light is on my sienna 2003 toyota

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CAn be related to failure of many of the inputs sensors that manages the ECM. So start with the oil pressure, crank sensor, fuel pressure . replace oil /oil filter if the pressure is low.

Posted on Sep 14, 2010

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Posted on Jan 02, 2017

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2003 Toyota Sienna A?C light blinking. Randomly cutting off when sitting at stop light or in park. will restart immediately. Now engine light on. Help.


Take it in to have a scran done on it, Most auto part store have a scranner, There is no charge to have it check out,

Nov 29, 2012 | 2003 Toyota Sienna

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99 TOYOTA CAMRY CHECK ENGINE LIGHT IS ON


You are going to have to get your car plugged in to a code reader and you will then be able to identify fault code causing check engine light illumination,

Oct 05, 2010 | 2003 Toyota Sienna

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The 'Battery' dashboard warning light has come on. What are the possible causes of this...bad battery, alternator, belt? 2003 Toyota Sienna


usually this indicates that the alternator is not charging you need to check the charge rate either with DC volt meter or a multi meter that is capable of DC voltage reading, the voltage when the engine is running should be between 13.8 & 14.3 volts if it is not the alternator or the voltage regulator is faulty,also check for loose wiring or bad connections.....hope this helps.....cheers

Jul 26, 2010 | 2003 Toyota Sienna

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Po420 on my 2001 sienna


P0420=Catalyst System Efficiency Below Threshold Bank 1,
The air filter is not the cause here,this is just a code saying your converter is not doing its best,

Jan 26, 2010 | 2001 Toyota Sienna

2 Answers

Check engine light on my 2003 sienna, DTC was



Oxygen Sensor Connector locations

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  1. Disconnect the oxygen sensor connector.
  2. Using an ohmmeter, measure the resistance between the terminals +B and HT. Resistance specification: 11 - 16 ohms at 20°C (68°F).
  3. If the resistance is not as specified, replace the sensor.
  4. Reconnect the oxygen sensor connector.

Oxygen Sensor testing

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I really hope helped with this. Remember rated this help, good luck.

Nov 30, 2009 | 2003 Toyota Sienna

1 Answer

Indicator light for a 2003 Toyota Sienna.


Is this it? If so, it means check your tire pressure.
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Mar 26, 2009 | 2007 Toyota Sienna

1 Answer

Check engine light on


U can either turn it off with a engine scan tool or disconnect the battery for 5 min's, if u disconnect the battery u may activate your anti-theft systems, so I recommend u have it turned off with a scan tool. A quick note: If the problem in the engine controls that turned the light on is not repaired the light will come back on in 20-30 miles.

Dec 15, 2008 | 2003 Toyota Sienna

1 Answer

2003 toyote sienna- the check engine light came on


The check engine light comes on when theres a sensor problem... you can take it to autozone they will check it for free and tell you what the problem is....

Dec 10, 2008 | 2006 Toyota Sienna

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