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1992 Audi A3 P1491 Fault Code Check

When you check 1992 Audi A3 car engine light came on code P1491 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However Audi manufacturer may have a different definition for the P1491 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

P1491 1992 1992 Audi A3 Code Clear

To solve P1491 1992 1992 Audi A3 problem, you'll have to remove the muffler, crankcase and other components blocking the valve chamber. Then, remove the cylinder head bolts (label for easy re-installation) Adjust the jaws of the valve spring compressor until they touch the top and bottom of the valve chamber Push the tool in to compress the spring and tighten the jaws Remove the retainers and lift out the valves , compressors and springs

1992 Audi A3 P1491 OBD-II Diagnostic Powertrain (P) Trouble Code Description

1992 Audi A3 car P1491 OBD-II Trouble Code Secondary Switch Solenoid Circuit Malfunction is one of the definitions for the P1491; however your vehicles manufacturer may have a different definition for the P1491 code. Please check below for you

Reason For 1992 Audi A3 P1491 Code

The reason of 1992 Audi A3 P1491 OBD-II Fault Code Check is P1491 Secondary Switch Solenoid Circuit Malfunction.
P1491 Code Reason

1992 Audi A3 P1491 Possibble Fix Ways :

The engine relies on the glow plugs to generate heat to help with the combustion cycle. Some engines only use the glow plugs when cold but others will allow the glow plugs to work when the ECU (vehicle's computer) needs them to be on to help with combustion. Problems in this area will cause diesel engine starting problems, uneven running and white smoke when the engine is cold.

If your vehicle failed a P1491 1992 1992 Audi A3 test and the P1491 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses P1491 a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look P1491 1992 1992 Audi A3: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression.

What does fault code P1491 mean for 1992 Audi A3 ?
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