How is fault code P0487 fixed?

A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training. 1. Scan for codes and check the live data, then clear it and drive a few miles to confirm it actually comes back rather than chasing a one-off glitch 2. Get your hands on the EGR throttle valve connector and inspect it properly. Look for green corrosion, melted pins, chafed insulation, and moisture. Most P0487s are sitting right here 3. With the ignition on, probe the signal circuit at the valve with a multimeter. You're looking for somewhere around 5V 4. Check the earth side. A test light or meter to a known-good ground will tell you if the valve's ground circuit is doing its job 5. Measure continuity and resistance through the circuit. An open or anything reading above about 1kΩ points to broken wiring or a dead actuator coil 6. If the wiring, connector, and earth all check out, test the valve. Replace it if it's failed. Only suspect the PCM after everything upstream is confirmed good

Exhaust Gas Recirculation Throttle Position Control Circuit

Jump to the fix

Severity

Low

Can I keep driving?

Usually drivable; have it fixed at the first opportunity.

First step

A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training. 1. Scan for codes and check the live data, then clear it and drive a few miles to confirm it actually comes back rather than chasing a one-off glitch 2. Get your hands on the EGR throttle valve connector and inspect it properly. Look for green corrosion, melted pins, chafed insulation, and moisture.

PPowertrain
0Generic code
4Emissions
87Sequence number

What does it mean?

The P0487 means that the engine control unit (ECU) is detecting a problem with the rate of exhaust gas recirculation (EGR) system flow or does not detect voltage to the EGR solenoid circuit. This trouble diagnostic code is composed by two parts. The first part is faulty EGR valve or problem with wiring harness (open or short circuits, broken wires, damaged or corroded connectors). The other part is related to throttle position control circuit.

Modern cars use the so called “drive by wire systems”. In this system the throttle pedal and throttle plate are not connected mechanically, but electrically. In the pedal there is potentiometer which follows the position of the pedal and sends a signal to an electrical motor positioned in the throttle body. In this arrangement you have a lot of electrical components and connections which can be source of the problem.

Symptoms

Likely causes

How to fix it

Codes From the Same System

All Fault Codes

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This information follows the generic OBD-II definition and does not replace a vehicle-specific diagnosis. The severity rating is rule-based; an authorised diagnostic reading is required for a definitive answer.