U3644 Audi Auto Trouble Code
U3644 Audi the main thing to check is to verify the operation of the VCT solenoid. You're looking for a sticking or stuck VCt solenoid valve caused by contamination. Refer to vehicle specific repair manual to perform component tests for the VCT unit.
Accelerator Pedal Position Sensor 1 Circuit Low and P2127 - Accelerator Pedal Position Sensor 2 Circuit Low would lead you to suspect a defective accelerator pedal position sensor.
U3644 Audi Possible Solution:
Brake Switch Out of Self-Test Range Indicates that during Key On Engine Off (KOEO) Self-Test, BPP signal was high. Or during Key On Engine Running (KOER) Self -Test, the BPP signal did not cycle high and low. Open or short in (BPP) circuit Open or short in stoplamp circuits Damaged PCM Malfunction in module(s) connected to BPP circuit (Rear Electronic Module [REM] Windstar and LS6/LS8 and Lighting Control Module (LCM) Continental and Town Car) Damaged Brake Switch Misadjusted Brake Switch Check for proper function of stoplamps. Follow correct Self-Test procedures, refer to Section 2, Quick Test.
U3644 Audi Description For All Models :
- Audi 100
- Audi 200
- Audi 4000
- Audi 50
- Audi 5000
- Audi 60
- Audi 75
- Audi 80
- Audi 90
- Audi 920
- Audi A1
- Audi A2
- Audi A3
- Audi A4
- Audi A5
- Audi A6
- Audi A7
- Audi A8
- Audi Ad
- Audi Allroad
- Audi C
- Audi Cabriolet
- Audi Concept
- Audi Coupe
- Audi Q3
- Audi Q5
- Audi Q7
- Audi Quattro
- Audi R8
- Audi Rs2
- Audi Rs3
- Audi Rs4
- Audi Rs5
- Audi Rs6
- Audi S1
- Audi S2
- Audi S3
- Audi S4
- Audi S5
- Audi S6
- Audi S8
- Audi Sq7
- Audi Tt
- Audi Ur
- Audi V8
- Audi Variant
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U3644 Audi Trouble Repair :
If your vehicle failed a U3644 Audi test and the U3644 Audi 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 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 any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression. Use your OBD Express DIY to look at the oxygen sensor outputs, coolant temperature, airflow, calculated engine load, and inlet air temperature. |
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