PowertrainP04D7

Caution

Severity: Caution - get it checked when you can

Exhaust brake input circuit intermittent/erratic

5 brands affected · Description from Toyota data.

Key terms: Catalytic converter: cleans the exhaust gases · EGR: exhaust gas recirculation, which cuts harmful gases · EVAP: the system that traps fuel vapour · Oxygen sensor: measures oxygen in the exhaust gas · Powertrain: engine, transmission and emissions

Safety: This code relates to the braking system. Have braking checked promptly.

1What it means in plain English

This range covers emissions control (EGR, EVAP, oxygen sensors and the catalytic converter), but some manufacturers also use P04 codes for oil-pressure, brake-fluid and coolant-level warnings.

2Common causes

Clogged or faulty EGR valve
EVAP system leak (hoses, canister, fuel cap)
Faulty oxygen sensor
Ageing catalytic converter
Low oil, brake fluid or coolant (on some models)
Wiring or connector fault

3Can I drive?

Caution · drive with care

The braking system may be affected. Have it checked promptly; if the pedal feels abnormal, the car pulls when braking, or a brake warning light is on, stop safely.

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 5

Brand	Code	Description	System
Ashok Leyland CV	P04D7	Malfunction In The Lamp 'F' Control Circuit In The Generator Brand	Powertrain
EOBD	P04D7	Sirkuit input rem knalpot intermiten/acak Brand	Powertrain
Isuzu	P04D7	No description available	Powertrain
Land Rover	P04D7	Exhaust Brake Input Circuit Intermittent/Erratic Brand	Powertrain
Toyota	P04D7	Exhaust brake input circuit intermittent/erratic 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.

5Related codes

Browse Pxxx codes or P04Dxx codes.