Ford C-MAX Hybrid (2018 year). Manual — part 66

Customer action required

Possible cause

Low tire pressure

warning light

Make sure tires are at the proper pres-
sure. See Inflating your tires in this
chapter. After inflating your tires to the
manufacturer’s recommended pressure
as shown on the Tire Label (located on
the edge of driver’s door or the B-Pillar),
the vehicle must be driven for at least
two minutes over 20 mph (32 km/h)
before the light turns off.

Tire(s) under-inflated

Solid warning light

Repair the damaged road wheel and tire
assembly and reinstall it on the vehicle
to restore system function. For a
description on how the system functions,
see When your temporary spare tire
is installed in this section.

Spare tire in use

If the tires are properly inflated and the
spare tire is not in use but the light
remains on, contact your authorized
dealer as soon as possible.

TPMS malfunction

Repair the damaged road wheel and tire
assembly and reinstall it on the vehicle
to restore system function. For a
description on how the system functions,
see When your temporary spare tire
is installed in this section.

Spare tire in use

Flashing warning

light

If the tires are properly inflated and the
spare tire is not in use but the light
remains on, contact your authorized
dealer as soon as possible.

TPMS malfunction

When Inflating Your Tires

When putting air into your tires (such as at
a gas station or in your garage), the tire
pressure monitoring system may not
respond immediately to the air added to
your tires.

It may take up to two minutes of driving
over 20 mph (32 km/h) for the light to turn
off after you have filled your tires to the
recommended inflation pressure.

How Temperature Affects Your Tire
Pressure

The tire pressure monitoring system
monitors tire pressure in each pneumatic
tire. While driving in a normal manner, a
typical passenger tire inflation pressure
may increase about 2–4 psi (14–28 kPa)
from a cold start situation. If the vehicle is
stationary overnight with the outside
temperature significantly lower than the
daytime temperature, the tire pressure may
decrease about 3 psi (21 kPa) for a drop of
30°F (17°C) in ambient temperature. This

lower pressure value may be detected by
the tire pressure monitoring system as
being significantly lower than the
recommended inflation pressure and
activate the system warning light for low
tire pressure. If the low tire pressure
warning light is on, visually check each tire
to verify that no tire is flat. If one or more
tires are flat, repair as necessary. Check
the air pressure in the road tires. If any tire
is under-inflated, carefully drive the vehicle
to the nearest location where air can be
added to the tires. Inflate all the tires to
the recommended inflation pressure.

TECHNICAL SPECIFICATIONS

Wheel Lug Nut Torque Specifications

WARNING

When a wheel is installed, always remove any corrosion, dirt or foreign materials
present on the mounting surfaces of the wheel or the surface of the wheel hub,
brake drum or brake disc that contacts the wheel. Make sure that any fasteners

that attach the rotor to the hub are secured so they do not interfere with the mounting
surfaces of the wheel. Installing wheels without correct metal-to-metal contact at the
wheel mounting surfaces can cause the wheel nuts to loosen and the wheel to come off
while your vehicle is in motion, resulting in loss of control.

Ib-ft (Nm)

*

Bolt size

100 (135)

M12 x 1.5

*

Torque specifications are for nut and bolt threads free of dirt and rust. Use only Ford

recommended replacement fasteners.

Retighten the lug nuts to the specified torque within 100 miles (160 kilometers) after any
wheel disturbance (such as tire rotation, changing a flat tire, wheel removal).

Tighten lug nuts in the order shown.

Wheel pilot bore

A

Inspect the wheel pilot bore and
mounting surface prior to installation.
Remove any visible corrosion or loose
particles.

ENGINE SPECIFICATIONS

2.0L ATK iVCT Engine

Engine

122

Cubic inches

Minimum 87 octane

Required fuel

1-3-4-2

Firing order

Coil on plug (COP)

Ignition system

12.3:1

Compression ratio

0.051 in. ± 0.002 in. (1.3 mm ± 0.05 mm)

Spark plug gap