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P000A Fault Code (Causes & Fixes) "A" Camshaft Position Slow Response Bank 1

Updated: Feb 4

✔ This article has been fact checked.

P000A is an OBD fault code that stands for "(A) Camshaft position slow response bank 1". This fault can occur for a variety of reasons.

A P000A trouble code means the camshaft's position varies from the position expected by the powertrain control module (PCM). The letter "A" shows that the problem is with the intake valves, and the word "Bank 1" shows that it is on the bank 1 side of the engine.

This code may be accompanied by a P0010 fault, indicating that bank 1 is the cause of the problem.

The fault codes P000B, P000C, and P000D are also related. P0011, P0012, P0013, P0014, P0015, P0020, P0021, P0022, P0023, P0024, and P0025 are some more codes that may occur.

If a DTC is related to the powertrain, it will begin with the letter "P" when read by an OBD reader. Fault codes in the P0xxx format are generic fault codes.

Table of Contents:

The Meaning of a P000A Fault Code

Vehicle camshafts open and shut the intake and exhaust valves on the engine's cylinders to keep the engine running smoothly. The camshaft timing is critical for the engine to run properly.

The timing of this action is slower than anticipated when the vehicle's computer produces the OBD code P000A.

  • In this case the fault is with the intake valves in bank 1, as shown by the letter "A".

  • The exhaust valves are denoted by the letter "B".

The PCM (powertrain control module) keeps a record of the camshaft's current and future positions.

During the diagnostic phase, the PCM detects a shortfall if the camshaft position change is less than it should be. If the variations in response time continue over time, a P000A code will be issued.

Possible Causes

There are various potential causes for this code due to the large number of moving components in the engine and camshaft system. The most frequent causes of a P000A fault code are as follows.

  • A corroded or damaged connector, wire, or harness

  • A defective PCM or ECM

  • Camshaft position actuator solenoid failure

  • Camshaft position sensor failure

  • Fuel cap is loose

  • Oil pressure is low (due to blockage in the oil galleries, faulty oil pump, low oil level, etc.)

  • Timing chain or belt problems

  • VCT (variable cam timing) phaser failure

  • VCT unit binding

A variety of factors might be causing your car to produce a P000A code.

Engine timing issues need the use of specialised equipment to assess engine timing and accurately reset the timing when all repairs are done.

Signs & Symptoms

Typically, the main indication of a P000A fault code is the illumination of the MIL (check engine light).

You may also notice the following:

  • Increase or change in engine noise

  • Poor engine performance

  • Higher emissions

Other fault codes, such as P0010 or other codes, may occur alongside a P000A code.

Is It Serious?

The vehicle may seem to function well and without any obvious significant problems.

However, if the problem is not resolved quickly, serious damage to components such as the camshaft follower may occur, necessitating expensive future repairs.

It is recommended that you do not drive the vehicle until it has been diagnosed and repaired.

Diagnosing the P000A Trouble Code

Begin the diagnostic process by validating the P000A code and fixing any previously set codes. Check the engine oil level and top it up if needed.

The codes should then be cleared, and the car should be examined again to see whether the problem persists. If the code occurs again, the following steps may be necessary.

  • Camshaft adjustment valve testing.

  • Examine the camshaft position actuator solenoid.

  • Check the oil levels in the engine and compare them to the manufacturer's recommendations.

  • Test the engine oil pressure.

  • Check the trouble code using a professional OBD scanner.

  • Visually inspect the camshaft advance mechanism.

  • Check for blockages in the oil channels.

  • Visually inspect the wiring and circuits for signs of damage or corrosion.

Common Diagnostic Mistakes

Low oil pressure is often overlooked as the primary cause of this error code, despite the fact that the problem might be with the camshaft mechanism or other components.

If any of the oil pump connections deteriorate or any of the channels get blocked, the lower oil pressure may result in the generation of a camshaft position slow response code.

As a consequence, it's advised to check the oil level and, if required, refill it to determine whether this fixes the issue.

Troubleshooting Steps

To learn more about the issue, look for technical service bulletins (TSB). If nothing is discovered, you may proceed to a standardised system diagnosis.

Because a P000A fault code requires different testing for different cars, the approach that follows is broad. To properly test the system, use the diagnostic flow chart given by the manufacturer.

Check the factory wiring schematics to identify which wires are which before you begin.

Test the Camshaft Position Sensor

The majority of camshaft position sensors are permanent magnet sensors or Hall Effect sensors.

A Hall Effect sensor is wired with three wires: reference, signal, and ground. In contrast, a permanent magnet sensor will only have two wires: ground and signal.

  • Hall Effect Sensor: It is necessary to identify the signal return wire. Then, using a back-probe test lead, attach it to a digital multimeter (DMM). Set the DMM to DC volts and connect the black metre line to chassis ground. If the sensor is operating correctly, you should see a fluctuating reading on the metre when you crank the engine. If not, the sensor must be replaced since it is faulty.

  • Permanent Magnet Sensor: After disconnecting the sensor connector, attach a multimeter to the sensor terminals. After you've set it to AC voltage, crank the engine. A changing voltage readout should be shown. If not, the sensor must be replaced since it is faulty.

Test the Sensor Circuit

  • Hall Effect Sensor: Begin by checking the ground side of the circuit. Attach a multimeter (set to DC volts) to the connector's harness side between the battery positive terminal and the sensor ground terminal to do this. If the ground is good, you should get a reading of about 12 volts. To test the 5-volt reference side of the circuit, connect a multimeter (set to volts) between the battery negative terminal and the sensor reference terminal on the harness side of the connection. Turn on the car's ignition. A reading of about 5 volts should be shown. Both of these tests must provide positive results; otherwise, the circuit must be located and repaired.

  • Permanent Magnet Sensor: Check the ground connection on the circuit. To achieve this, attach a multimeter (set to DC volts) between the battery's positive terminal and the sensor ground connection on the connector's harness side. If the ground is good, you should get a reading of about 12 volts. If not, a circuit diagnostic and repair will be necessary.

Test the Oil Control Solenoid

Disconnect the solenoid connection. To determine the internal resistance of the solenoid, use an ohms-reading digital multimeter.

To achieve this, connect the multimeter between the solenoid ground terminal and the solenoid B+ terminal. Compare the resistance measurement to the OEM specifications.

If the multimeter displays a reading that is outside of limits (OL) or out of specification, it is time to replace the solenoid.

By removing the solenoid, you will be able to physically inspect the screen for metal shavings.

Check the Oil Control Solenoid Circuit

  • Check Power Side: Disconnect the solenoid connection. Check for power at the solenoid using a digital multimeter (set to DC volts) while the car is turned on (typically about 12 volts). Connect the negative metre lead to the battery's negative terminal and the positive metre lead to the solenoid B+ terminal on the connector's harness side. The metre should display around 12 volts. Otherwise, the circuit must be examined and corrected.

  • Check Ground Side: Disconnect the solenoid connection. Check for ground with a digital multimeter (set to DC volts) when the car ignition is turned on. Connect the positive metre lead to the battery positive terminal and the negative metre lead to the solenoid ground terminal on the harness side of the connection to accomplish this. Using an OEM equivalent scan tool, turn on the solenoid. The metre should show around 12 volts. Otherwise, the circuit must be examined and corrected.

Check the Timing Chain & VVT actuators

If everything has been operating well up until this point, the timing chain or VVT actuators might be the problem.

  1. To gain access to the timing chain and actuators, remove the necessary components.

  2. Examine the chain for excessive movement, damaged guides or tensioners.

  3. Examine the actuators for signs of wear and tear (such as worn teeth).

Possible Fixes for a P000A Code

Once the P000A error code has been verified, you may try the following fixes to see if they resolve the problem.

  • Replace any wires or connections that are shorted, open, or loose.

  • Fill engine oil according to the manufacturer's recommendations.

  • Repair or replace the oil pump if it is damaged or broken.

  • Repair or replace the camshaft position sensor if it is damaged or ineffective.

  • Repair or replace a faulty or damaged camshaft position actuator.

  • Repair or replace the camshaft adjustment valve if it is broken or malfunctioning.

  • Repair or replace a defective or damaged ECM.

  • Clear all codes, test the vehicle, and then rescan to see if any fault codes reappear.


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