P2142 Fault Code

Exhaust Gas Recirculation Throttle Control Circuit A High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2142 fault code indicates a problem with the Exhaust Gas Recirculation (EGR) throttle control circuit A, which is reporting a high voltage or unexpected signal. This can affect engine performance and emissions, leading to inefficient combustion and potentially triggering the Check Engine light.

What are the symptoms of the P2142 code?

Drivers may notice various symptoms when this fault code is triggered, such as:

• Decreased engine performance and power.
• Rough idling or stalling.
• Increased emissions leading to failed emissions tests.
• Check Engine light illuminated on the dashboard.

What causes the P2142 code?

There are several potential causes for the P2142 fault code, including:

• Faulty EGR throttle control valve.
• Short circuits or wiring issues in the EGR control circuit.
• Malfunctioning Engine Control Module (ECM).
• Accumulated carbon deposits affecting the EGR system functionality.

How to fix P2142?

To resolve the P2142 fault code, it is essential to:

• Perform a thorough inspection of the EGR throttle control valve and its wiring.
• Clean or replace any carbon deposits within the EGR system as necessary.
• Test the ECM to ensure it is functioning correctly and replace if faulty.
• Clear the fault codes and conduct a road test to confirm the issue is resolved.