PowertrainP0687

Serious

Severity: Serious - have it checked soon

ECM/PCM Power Relay Control Circuit High

33 brands affected · Generic SAE J2012 description.

Key terms: Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

The engine computer or one of its output circuits has a fault.

2Common causes

Engine control module fault
Power or ground connection problem
Low battery or charging voltage
Wiring short or open circuit
Software or memory fault

3Can I drive?

Serious · drive with care

If the engine runs normally, drive carefully to a workshop for diagnosis. If it runs badly, stalls, or will not restart, have the car towed.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 33

Brand	Code	Description	System
Ashok Leyland CV	P0687	ECM/PCM Power Relay Control Circuit High SAE	Powertrain
BAIC Motor	P0687	Main relay circuit voltage high Brand	Powertrain
BYD	P0687	ECM/PCM Power Relay Control Circuit High Brand	Powertrain
Chery	P0687	Error Path For Main Relay Brand	Powertrain
Daewoo	P0687	Main Relay Circuit Voltage High Brand	Powertrain
Daihatsu	P0687	IGCT relay error Brand	Powertrain
DFFS	P0687	Main relay circuit short Brand	Powertrain
DFFX	P0687	Main relay short circuit Brand	Powertrain
DFXK	P0687	Main relay circuit short Brand	Powertrain
EOBD	P0687	Styrkrets ECM/PCM-strömrelä hög Brand	Powertrain
Geely	P0687	Main Relay Circuit Short to Power Brand	Powertrain
GM	P0687	ECM/PCM Power Relay Control Circuit High Brand	Powertrain
Great Wall	P0687	Main relay stuck Brand	Powertrain
Hafei	P0687	ECM/PCM Power Relay Control Circuit High Brand	Powertrain
Holden	P0687	Engine Controls Ignition Relay Control Circuit High Voltage Brand	Powertrain
Honda	P0687	ECM/PCM Power Relay Control Circuit High SAE	Powertrain
Hyundai	P0687	ECM/PCM Power Relay Control Circuit High SAE	Powertrain
Isuzu	P0687	ECM/PCM Power Relay Control Circuit High SAE	Powertrain
Land Rover	P0687	ECM/PCM Power Relay Control Circuit High SAE	Powertrain
Mahindra	P0687	ECM/PCM Power Relay Control Circuit High SAE	Powertrain
Mitsubishi	P0687	Fuel pump relay circuit high Brand	Powertrain
Opel	P0687	ECM/PCM Power Relay Control Circuit High Brand	Powertrain
Perodua	P0687	IGCT relay error Brand	Powertrain
Peugeot	P0687	ECM/PCM Power Relay Control Circuit High SAE	Powertrain
Porsche	P0687	If fault codes P0685 AND are entered Brand	Powertrain
Proton	P0687	Fuel pump relay circuit high Brand	Powertrain
Saab	P0687	ECM/PCM Power Relay Control Circuit High Brand	Powertrain
MG (SAIC)	P0687	ECM/PCM Power Relay Control Circuit High Brand	Powertrain
Subaru	P0687	ECM/PCM Power Relay Control Circuit High SAE	Powertrain
Suzuki	P0687	ECM / PCM Power Relay Control Circuit High Brand	Powertrain
Tata	P0687	Power Control Relay Circuit Hig Brand	Powertrain
Toyota	P0687	Main relay circuit short Brand	Powertrain
Volkswagen	P0687	ECM power relay control circuit (J271): short to plus; Short to plus Brand	Powertrain

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Extended variant codes 2

These 7-character codes are manufacturer-specific variants of P0687 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P068700	The output for relay 'Circuit 87' has a short circuit to positive. Brand	Powertrain
SsangYong	P068700	Main relay fault(Stuck) Brand	Powertrain

6Related codes

Browse Pxxx codes or P068xx codes.