P00B8 Citroen 15 Diagnostic Trouble Code

P00B8 Citroen 15 code definition:
P00B8 is a kind of OBD-II Diagnostic P-Powertrain Diagnostic Trouble Code for Citroen 15.

P00B8 Citroen 15 is defined as Cylinder 3 Injector Circuit Malfunction. This code means the PCM (powertrain control module, also known as ECM or engine control) has detected a problem in the injector or its wiring, or in injector circuit for cylinder 3. Other symptoms that may indicate this problem are when the Check Engine Light illuminates and when there is a visible lack of engine power.

Symptoms

Symptoms of a P00B8 Citroen 15 diagnostic trouble code may include:
  • Rich or lean exhaust
  • Fuel pressure too low
  • Engine surge
  • Reduction in engine performance, especially at low RPM levels
Place of P00B8 in engine

Possible Causes :

  • A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
  • Some aftermarket accessories and performance modifications
  • Faulty IMRC actuator relay (if equipped)

Common Misdiagnoses

  1. Crankshaft Position Sensor Circuit Performance Problem
  2. TP Sensor Learn Not Complete Problem
  3. Low Coolant Circuit Problem
  4. Cruise Control System - Vehicle Accel Too High Problem
  5. Kick-Down Switch Failed Short Problem

Repair Processes :

With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem.

Process Tips

Diagnostic trouble code P00B8 Citroen 15 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 P00B8 Citroen 15.

Fortunately, P00B8 Citroen 15 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

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