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P208C OBD2: Reductant Pump Control Circuit Low

P208C OBD2: Reductant Pump Control Circuit Low

The P208C OBD-II code indicates an issue with the Reductant Pump Control Circuit, specifically signaling that the circuit is low. This code is typically associated with diesel engines that utilize Diesel Exhaust Fluid (DEF) to reduce emissions.

What Does the P208C Code Mean?

The P208C code is logged when the Powertrain Control Module (PCM) detects a low voltage condition within the Reductant Pump Control Circuit. This circuit is critical for the operation of the Reductant Pump, which injects DEF into the exhaust stream to facilitate the conversion of harmful emissions into less harmful substances.

What Causes the P208C Code?

Several factors can trigger the P208C code:

  • Failure of the Reductant Pump
  • Wiring issues in the Reductant Pump control circuit
  • Failure of the Powertrain Control Module (PCM)

What Are the Symptoms of the P208C Code?

The primary symptom associated with the P208C code is:

  • DPF (Diesel Particulate Filter) regeneration may not occur, leading to potential clogging and reduced engine performance.

How Serious Is the P208C Code?

The P208C code is classified as urgent. Immediate action is required as ignoring it can lead to severe damage to the vehicle’s exhaust system and may pose safety risks to the driver and passengers.

How to Diagnose the P208C Code

A proper diagnosis involves:

  • Using a diagnostic scanner to confirm the P208C code and check for any related codes.
  • Inspecting the wiring and connectors related to the Reductant Pump for any signs of damage or corrosion.
  • Testing the Reductant Pump to ensure it is functioning correctly.
  • Checking the PCM for any faults that may affect the control circuit.

Common Repairs for the P208C Code

Depending on the diagnosis, common repairs may include:

  • Replacing the Reductant Pump if it is faulty.
  • Repairing or replacing damaged wiring or connectors in the control circuit.
  • Reprogramming or replacing the PCM if it is determined to be faulty.

How Much Does It Cost to Fix the P208C Code?

The cost to fix the P208C code can vary widely based on the specific issue. Typical repairs may range from $200 to $1,500, depending on whether components are replaced or if extensive wiring repairs are needed.

Can I Fix the P208C Code Myself?

While some aspects of diagnosing and repairing the P208C code may be manageable for experienced DIY mechanics, it is often recommended to consult a professional, especially if PCM issues are suspected. Proper diagnosis is crucial to avoid unnecessary repairs.

About JC Landry

JC spent 15+ years as a certified Master Mechanic before trading the shop for the keyboard. He's worked across dealerships, owned and operated his own independent garage, and consulted on automotive trade school curricula, reviewing technical textbooks used in vocational programs. He now serves as Editor-in-Chief at eManualOnline.com, where he oversees the platform's technical content. He's one of the few voices in automotive publishing who has actually turned wrenches professionally on the vehicles he covers. He didn't learn automotive repair to write about it. He learned to write after spending over a decade doing it.

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