P2141 EGR Throttle Position Control Circuit A Low

📌 What is the P2141 code?

The P2141 code indicates an electrical problem in the EGR throttle control valve circuit (Exhaust Gas Recirculation). This system is crucial for reducing NOx emissions by recirculating some exhaust gases into the intake.

Possible meaning:

“EGR throttle control valve circuit – short circuit”

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⚠️ Possible symptoms

• 🚨 Engine warning light on (MIL)

• 🔄 Extended DPF regeneration time (diesel particulate filter)

• 🌫️ Increased soot emissions

• 💨 Poor engine performance during post-treatment

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❌ Common causes

• ⚡ Short to ground or power in the EGR valve wiring

• 🛠️ Faulty EGR throttle control valve (internally shorted)

• 🔌 Oxidized or melted connectors

• 🧠 Faulty PCM (engine control module) (rare)

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🧪 Diagnostic and repair steps

🧰 1. Visual inspection

• Locate the EGR throttle control valve (between air filter and intake manifold).

• Check connectors, wiring harnesses, signs of heat, corrosion, damaged or melted wires.

• Clean connectors with contact spray + plastic brush, then apply dielectric grease.

🧪 2. Clearing the code

• Clear the code using an OBDII scanner. If it does not return, the issue was likely with the connections.

📏 3. Voltage test with DVOM (multimeter)

• Disconnect the valve.

• Place the red lead on the signal wire of the valve and the black lead to ground.

• You should read approximately 5 volts.

  • 🔴 12 volts or 0 volts = short circuit or open circuit → check the wiring harness to the PCM.

🔌 4. Ground test

• Connect a test light between the battery +12V and the ground of the valve connector.

• If it does not light up, the ground is faulty.

• Move the wiring harness to check for intermittent poor contact.

🔄 5. Replacing the valve (if tests are OK)

• If all wiring, voltages, and grounds are good but the code still returns, replace the EGR throttle control valve.

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✅ Quick action summary