B1624 Holden Vq Diagnostic Trouble Code
B1624 Holden Vq code definition:
B1624 is a kind of OBD-II Diagnostic B-Body Diagnostic Trouble Code for Holden Vq.
B1624 Holden Vq is defined as Camshaft Position Sensor A Circuit Low. This means the CMP (camshaft position) sensor circuit on engine bank 1 sends an irregular reading. The spark should have a light tan color. If the sensor probe comes with white and chalky parts, this means it has been lagging between switching phases, and should be replaced.
Symptoms
Symptoms of a B1624 Holden Vq diagnostic trouble code may include:
- If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
- Corroded or damaged connector
- Reduction in engine performance, especially at low RPM levels
- The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
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Possible Causes :
- An air leak forward of the DPF will change the sensor readings resulting in the code
- Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
- Fuel with a large percentage of sulfur will clog the DPF quickly
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Common Misdiagnoses
- Control Module Throttle Actuator Position Performance Problem
- Air Conditioning (A/C) Clutch Feedback Circuit High Voltage Problem
- Cruise Vehicle Speed/Set Speed Difference Too High Problem
- Kick-Down Switch Failed Short Problem
- Park/Neutral Postion (PNP) Switch Circuit Engine Torque Signal Circuit Problem
Repair Processes :
You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.
Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.
Process Tips
Diagnostic trouble code B1624 Holden Vq is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.
Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before B1624 Holden Vq.
Fortunately, B1624 Holden Vq is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.
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