Issue

Engine management, emission or sensor fault. Common on Partner 1.6 HDi (DV6) & 1.2 PureTech (timing chain / wet belt issues).

Symptoms

• loss of power, rough idle
• higher fuel consumption
• flashing = catalytic damage risk

Diagnosis (detailed)

• 1. Read fault codes with OBD2 (P0000–P2FFF).
• 2. Check for vacuum leaks (hoses, intake gasket).
• 3. Test ignition coils & spark plugs (petrol).
• 4. Diesel: injector leak‑off test, EGR valve operation.
• 5. Monitor fuel trims, O2 sensor voltage, MAF values.
• 6. Perform compression test if misfire persists.

Repair cost

Issue

Low oil pressure – engine damage imminent. Partner 1.6 HDi oil pump drive chain can snap.

Symptoms

• light flickers or stays on
• ticking / knocking from engine

Diagnosis

• 1. Check oil level & condition (sludge?)
• 2. Replace pressure switch (cheap, common fail)
• 3. Manual oil pressure test (min 0.3 bar hot idle)
• 4. Inspect oil pickup pipe blockage
• 5. Oil pump / pressure relief valve

Costs

Issue

Alternator not charging, bad connection, or battery sensor (BSI). Stop‑start models have additional battery monitoring.

Symptoms

• lights dim, slow crank
• stop‑start unavailable
• burning smell (alternator)

Diagnosis

• voltage test: engine off 12.4V+, running 13.8–14.6V
• inspect belt & tensioner (Partner 1.6 HDi prone to belt slip)
• load test battery & alternator diodes
• check earth straps (gearbox to chassis)

Costs

Issue

Engine overheating / low coolant. Partner electric fans often fail (relay/module).

Symptoms

• steam, hot smell, gauge high
• heater blows cold
• coolant loss

Diagnosis

• check coolant level & leaks (water pump weep hole)
• test thermostat (opening temp ~82°C)
• verify fan operation (fuse, relay, motor)
• pressure test cooling system
• check for combustion gas in coolant (head gasket)

Costs

Issue

Handbrake on, low fluid, pad wear (Partner has pad wear sensors).

Symptoms

• spongy pedal, longer travel
• squealing or grinding
• fluid reservoir low

Diagnosis

• check fluid level & leaks (calipers, pipes)
• inspect pad thickness & sensor wires
• check ABS unit for internal leak
• brake servo (vacuum) test

Costs

Issue

Anti‑lock system fault – wheel speed sensor, reluctor ring, or pump motor. Partner rear rings rust.

Symptoms

• ABS light on, system inactive
• speedometer may fail (rear sensor)

Diagnosis

• scan for C1xxx codes
• measure sensor resistance (800–2000Ω)
• inspect reluctor ring for cracks/rust
• check ABS pump/module power supply

Costs

Issue

Passive safety fault. Partner common: corroded connectors under seats, clockspring failure.

Symptoms

• light stays on, airbag may not deploy
• horn/steering wheel controls fail

Diagnosis

• scan SRS codes (B1xxx)
• wiggle yellow connectors under front seats
• check clockspring continuity
• reset with diagnostic tool

Costs

Issue

EPS or electro‑hydraulic fault. Partner electric column can overheat.

Symptoms

• heavy steering, intermittent assist
• warning beep + light

Diagnosis

• battery voltage (low causes EPS light)
• torque sensor calibration
• steering angle sensor reset
• check fluid (hydraulic version)

Costs

Issue

Tyre pressure low or sensor fault. Partner indirect (ABS based) or direct sensors.

Symptoms

• light on after rotation
• pressure mismatch

Diagnosis

• check & adjust pressures, reset button
• scan for sensor IDs (direct)
• trigger each sensor with tool

Costs

Issue

Diesel particulate filter clogged (Partner 1.6 HDi short trips).

Symptoms

• loss of power, limp mode
• high fuel consumption
• auto regen frequent

Diagnosis

• check soot mass (diagbox)
• differential pressure sensor
• forced regeneration test
• additive level (Partner fluid)

Costs

Issue

NOx reduction system fault / low fluid (Partner BlueHDi).

Symptoms

• countdown starts (engine start limit)
• engine light

Diagnosis

• refill AdBlue (quality matters)
• check pump, injector, NOx sensor
• SCR catalyst efficiency

Costs

Issue

Pre‑heating fault – hard cold start, smoke. Partner 2.0 HDi plugs fragile.

Symptoms

• light flashes
• rough start below 0°C

Diagnosis

• measure plug resistance (0.6–2Ω)
• check relay & fuse
• glow plug control unit (PSA specific)

Costs

Issue

Maintenance reminder / service interval overdue.

Symptoms

• spanner light + miles countdown

Diagnosis

• reset via dashboard button sequence
• or diagbox reset

Costs

Issue

Electronic stability program fault – often steering angle sensor, yaw rate, or brake switch.

Symptoms

• light on, system inactive
• sometimes speedo erratic

Diagnosis

• scan for C0xxx / U1xxx
• recalibrate steering angle sensor
• check brake light switch

Costs

Issue

System inactive or fault – often battery state of charge, battery sensor, or clutch switch.

Symptoms

• light amber, no auto stop

Diagnosis

• battery condition test (AGM/EFB)
• check brake vacuum sensor
• clutch position switch

Costs

Issue

Fuel level low – sender or gauge fault possible.

Symptoms

• light on, range 0

Diagnosis

• refuel, if light stays: sender failure
• check fuel gauge resistance

Costs

Issue

Water detected in fuel filter – drain immediately to avoid injection pump damage.

Symptoms

• light on, possible limp mode

Diagnosis

• open drain valve on filter
• replace filter if contaminated

Costs

Issue

Contact switch faulty or door ajar. Bonnet switch (Partner) can cause alarm issues.

Symptoms

• light with door symbol

Diagnosis

• check all doors/bonnet/tailgate
• test microswitches

Costs

Issue

Belt not fastened or sensor fault.

Symptoms

• light + chime

Diagnosis

• buckle switch continuity
• occupant detection mat (passenger)

Costs

Issue

Automatic or EGS (robotised) gearbox fault – Partner EGS pump, shift actuator.

Symptoms

• gearbox warning, stuck in gear
• poor engagement

Diagnosis

• check oil level & condition
• scan for transmission codes
• actuator calibration

Costs

Issue

Key not recognised, transponder or ring aerial fault.

Symptoms

• light flashing, no start

Diagnosis

• try spare key
• check ring aerial resistance
• BSI / key programming

Costs

Issue

Front or rear pads below minimum (wear sensor triggers light).

Symptoms

• grinding noise, light on

Diagnosis

• visual pad thickness
• check sensor wire continuity

Costs

Issue

Eolys fluid low (Partner with DPF).

Symptoms

• specific additive warning

Diagnosis

• check additive level / refill
• reset counter with diagbox

Costs