PowertrainP0021

Caution

Severity: Caution - get it checked when you can

A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)

39 brands affected · Generic SAE J2012 description.

Key terms: Oxygen sensor: measures oxygen in the exhaust gas · Mass air flow sensor: measures the air going into the engine · Bank 2: the side of the engine containing cylinder 2 · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

This code is in the fuel and air metering range, which includes fuel-pressure and camshaft-timing faults.

2Common causes

Dirty or faulty mass air flow sensor
Vacuum or intake air leak
Weak fuel pump or clogged fuel filter
Faulty fuel injector
Faulty oxygen sensor
Wiring or connector fault

3Can I drive?

Caution · drive with care

Have it diagnosed promptly. Some codes in this range affect fuel pressure or camshaft timing; if the engine loses power, runs badly, or stalls, stop safely and get professional help.

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 39

Brand	Code	Description	System
Ashok Leyland CV	P0021	A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2) SAE	Powertrain
BAIC Motor	P0021	Insulation too low Brand	Powertrain
Mercedes-Benz	P0021	A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2) SAE	Powertrain
BMW	P0021	A Camshaft Pos. - Timing Over-Advacend or System Perf. B2 Brand	Powertrain
BYD	P0021	A Camshaft Position Timing Over-Advanced or System Performance Bank 2 Brand	Powertrain
Chery	P0021	A Camshaft Position Timing Over-Advanced or System Performance Bank 2 Brand	Powertrain
Daewoo	P0021	Intake Camshaft Position Range/Performance Brand	Powertrain
Daihatsu	P0021	VVT2 control Brand	Powertrain
DFFS	P0021	Engine torque information (CAN) fault Brand	Powertrain
DFFX	P0021	A Camshaft Position Timing Over-Advanced or System Performance Bank 2 Brand	Powertrain
DFXK	P0021	A Camshaft Position Timing Over-Advanced or System Performance Bank 2 Brand	Powertrain
EOBD	P0021	'A' nokkenaspositie - timing te vroeg of systeemprestaties bank 2 Brand	Powertrain
Geely	P0021	A Camshaft Position Timing Over-Advanced or System Performance Bank 2 Brand	Powertrain
GM	P0021	A Camshaft Position Timing Over-Advanced or System Performance Bank 2 Brand	Powertrain
Great Wall	P0021	A Camshaft Position Timing Over-Advanced or System Performance Bank 2 Brand	Powertrain
Hafei	P0021	A Camshaft Position Timing Over-Advanced or System Performance Bank 2 Brand	Powertrain
Holden	P0021	Intake Camshaft Position System Performance Bank 2 Brand	Powertrain
Honda	P0021	A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2) SAE	Powertrain
Hyundai	P0021	A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2) SAE	Powertrain
Isuzu	P0021	A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2) SAE	Powertrain
Land Rover	P0021	A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2) SAE	Powertrain
Mahindra	P0021	Intake valve timing control - bank 2 Brand	Powertrain
Maserati	P0021	Bank 2 Camshaft 1 Position Timing Over Advanced or System Performance Brand	Powertrain
Mitsubishi	P0021	A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2) SAE	Powertrain
Nissan	P0021	A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2) SAE	Powertrain
Opel	P0021	A Camshaft Position Timing Over-Advanced or System Performance Bank 2 Brand	Powertrain
Perodua	P0021	VVT2 control Brand	Powertrain
Peugeot	P0021	A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2) SAE	Powertrain
Porsche	P0021	A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2) SAE	Powertrain
Proton	P0021	A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2) SAE	Powertrain
Renault	P0021	A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2) SAE	Powertrain
Saab	P0021	A Camshaft Position Timing Over-Advanced or System Performance Bank 2 Brand	Powertrain
MG (SAIC)	P0021	A Camshaft Position Timing Over-Advanced or System Performance Bank 2 Brand	Powertrain
Subaru	P0021	A Camshaft Position System Performance Brand	Powertrain
Suzuki	P0021	A' Camshaft Position - Timing Over - Advanced or System Performance (Bank 2) Brand	Powertrain
Tata	P0021	'A' Camshaft Position - Timing Over-Advanced Or System Performance Bank 2 Brand	Powertrain
Toyota	P0021	Lost communication with steering column top unit ECU (COM2003) Brand	Powertrain
Volvo	P0021	Camshaft Position Timing Over Advanced (Bank 2) Brand	Powertrain
Volkswagen	P0021	Bank 2: camshaft A (intake): retard setpoint not reached (over-Advanced) 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 P0021 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P002164	Die Position der Einlassnockenwelle (Zylinderreihe 2) weicht vom Sollwert ab. Es liegt ein unplausibles Signal vor. Brand	Powertrain
Mercedes-Benz	P002177	Die Position der Einlassnockenwelle (Zylinderreihe 2) weicht vom Sollwert ab. Befohlene Position nicht erreichbar Brand	Powertrain

6Related codes

Browse Pxxx codes or P002xx codes.