⚠️ Peugeot Expert Tepee
Dashboard Warning Lights
Everything you need: symptoms, professional diagnosis (step‑by‑step), real repair costs, and reset tips — for every light on your Expert Tepee (2007–2022).
| Symbol / light | Colour | Common root cause | Immediate action |
|---|---|---|---|
| 🔧 Check engine | amber | EGR, O2 sensor, misfire, AdBlue | Scan codes; drive gently |
| 🛢️ Oil can | red | Low pressure/level, pump | STOP engine, check oil |
| 🔋 Battery | red | Alternator, bad battery | Check voltage, belts |
| ⭕ Brake (red circle) | red | Handbrake on / low fluid / pads | Check fluid level |
| 🛞 ABS | amber | Wheel speed sensor, ring | Diagnostic scan |
| 💥 Airbag | amber | Seat connector, clock spring | Check under seats |
| ⏲️ Glow plug (diesel) | amber | Preheat failure, relay | Test glow plugs |
| 🚗 ESP / ASR | amber | Steering angle sensor, yaw rate | Re-calibrate, scan |
| 💧 AdBlue / urea | amber | Low level, NOx sensor, heater | Top up, diagnostic |
| 🌡️ Coolant temp | red | Low coolant, thermostat stuck | Stop, check coolant |
| 🔰 DPF | amber | Soot overload, additive fault | Forced regen needed |
| ⚙️ Power steering | amber | EPS motor, torque sensor | Check battery voltage |
Check engine light (MIL) very common
Issue: On Peugeot Expert Tepee (1.6/2.0 HDi, 1.6 VTi) the MIL illuminates due to emission system faults: EGR valve stuck, O2 sensor ageing, AdBlue system (SCR), or small evap leaks.
- Symptoms: rough idle, power loss, increased fuel consumption, flashing light = severe misfire (catalyst risk).
Step 1 – OBD2 scan: Locate port under dash. Read codes (P0400, P0420, P1440, etc.). Write them down.
Step 2 – visual & simple: Check fuel cap tight; inspect air filter, visible wires. Reset codes and see if they return.
Step 3 – advanced: Use live data: fuel trims, O2 sensor voltages, EGR position. Perform EGR function test with scan tool. Smoke test for vacuum leaks.
More diagnostic options: compression test (if misfire), injector return flow test (diesel), AdBlue refill & reset.
Est. repair: $90–$750 (diagnostic $50-120, O2 sensor $140-280, EGR valve $250-650, AdBlue injector $400-800)
Oil pressure warning (red) STOP
- Red oil can + audible warning. Engine may rattle, lifters noisy.
Stop engine immediately! Check oil level on dipstick (car on level ground).
If level OK but light stays, suspect faulty pressure switch (located near oil filter). Unplug switch – if light goes out, switch defective.
Mechanical pressure test: remove switch, attach pressure gauge. Min 0.3 bar at idle, 2-5 bar at 2000 rpm. Low readings = pump, pickup pipe, or bearings.
Peugeot specific: 2.0 HDi engines can suffer from clogged oil strainer due to soot sludge – requires sump removal and cleaning.
Repair range: oil change $60-100, pressure switch $70-140, oil pump $500-1100, engine flush $150-250.
Battery charge warning
- Red battery symbol; dim lights, slow crank, possible smell.
🔋 Multimeter test: engine off 12.4V+ ; running 13.8-14.8V. Below 13V = alternator not charging.
🔧 Inspect alternator belt tension and condition. Check large fuses (maxi fuse under bonnet).
⚡ Load test battery with carbon pile. If battery passes, alternator diode test (AC ripple).
Battery $100-250, alternator $380-800 (reman), voltage regulator $150-250.
Brake warning (red circle)
- Handbrake on? low brake fluid, worn pads (sensor), or leak.
Check fluid reservoir level – top up with correct DOT4. If level drops fast, inspect calipers, pipes.
If fluid ok, lift vehicle and check pad thickness (many Tepee have wear sensors).
Handbrake switch stuck? test by pulling handbrake slightly.
💸 Pads & discs $200-450/axle, master cylinder $250-480, brake fluid flush $80-120.
ABS light
- ABS inactive, normal braking, light stays on after start.
🔍 Scan ABS module (codes C1xxx, C13xx). Rear wheel speed sensors fail often on Expert.
📏 Inspect sensor wiring, tone ring for damage. Measure sensor resistance (800-1800Ω).
🔄 Check reluctor ring (magnetic encoder) for cracks or rust.
🛞 Sensor $80-200, hub with bearing $250-500, ABS module $800-1500.
Airbag / SRS warning
- Light stays on, airbags may not deploy.
First, check connectors under front seats (yellow or orange) – often loose. Disconnect battery before touching airbag parts.
Use SRS scanner (airbag codes B1xxx). Common: driver’s airbag spiral clock spring (tear in ribbon).
Seat occupancy sensor failure (passenger detection) – may need mat replacement.
🔌 Clock spring $190-350, seat sensor $200-450, SRS module reset $100-200.
Tyre pressure monitor (TPMS)
- Low tyre symbol + “underinflation” message.
Manually check pressures with gauge. If all correct, sensor battery may be weak.
Use TPMS trigger tool to see if sensors respond. For 2010+ Expert, sensors are inside valve stem.
After replacing sensor, relearn procedure with diagnostic tool or magnet.
💰 Sensor $50-130 each, relearn $40-80.
AdBlue / urea warning
- Countdown miles, “emission fault”, limp mode.
Check AdBlue level via dashboard menu. Top up with correct fluid (avoid overfill).
Scan for NOx sensor or AdBlue injector codes (P20EE, P2047). Nox sensor readings implausible?
Inspect AdBlue tank heater (common failure – fluid freezes, but heater should thaw).
🧪 AdBlue refill $25-60, NOx sensor $350-600, heater element $200-450, injector $400-800.
Coolant temp warning (red)
- Needle high, red light, possible steam.
STOP engine, let cool. Check coolant level (expansion tank). Top up only when cold.
Inspect for leaks: hoses, radiator, water pump weep hole. Turn on AC to force radiator fan – check fan operation.
Thermostat stuck closed? Use infrared gun: inlet/outlet hose temps differ.
🌡️ Thermostat $120-250, water pump $350-700, fan control module $200-450, radiator $300-600.
Power steering warning
- Heavy steering, warning light (EPS or hydraulic).
Hydraulic: check fluid level, belt, pump noise. Electric (most Expert Tepee): measure battery voltage – low voltage causes EPS fault.
Scan steering angle sensor, torque sensor. Calibration may be needed after alignment.
Check fuse / relay for EPS. On 2012+ models, steering column motor can fail.
⚙️ Pump $500-950, EPS column $800-1500, angle sensor $200-350.
DPF / particulate filter
- DPF light on, additive (Eolys) warning, limp mode.
Attempt manual regeneration: drive at 40+ mph for 20 min with low rpm (2000-2500). If light remains, forced regen via scan tool needed.
Check differential pressure sensor readings, soot load (scan tool).
Additive level (Eolys) – low fluid prevents regen. Top up with correct fluid and reset counter.
💨 Forced regen $150-300, cleaning $500-800, new DPF $2000+, additive flush $250-400.
Glow plug light flashing
- Diesel preheat light flashes, hard starting, smoke.
Measure resistance of each glow plug (0.5-2 ohms). Open circuit = dead plug.
Check glow plug relay (under bonnet fuse box) and fuse. Command activation with scan tool.
Wiring harness often brittle and breaks near plug connector.
🔌 Set of 4 plugs $90-200, relay $70-150, harness $80-150.
ESP / ASR light
- ESP light on steady, traction control inactive, sometimes with ABS light.
Scan ABS/ESP module: often steering angle sensor not calibrated. Perform steering calibration (turn full left to right with engine on).
Check yaw rate sensor (under centre console) – can fail due to moisture.
Brake light switch faults also disable ESP – check brake lights.
🔄 Sensor calibration $80-150, yaw sensor $300-500, brake switch $40-90.
Low fuel level
- Amber fuel pump symbol, audible beep.
Refuel asap. If light stays on after refuel, sender unit may be stuck (common on older Tepee).
Check fuel gauge operation; if erratic, sender in tank needs replacement.
⛽ Sender unit $150-300, tank removal labour $250-450.
Water in diesel / pre-filter
- “Water in diesel” message or symbol (droplet).
Locate water drain screw on fuel filter housing (usually under bonnet). Place container, open drain until pure diesel comes out.
If warning returns, sensor in filter may be contaminated or wiring fault.
💧 Drain (DIY) free, filter replacement $40-80, sensor $90-180.
Seatbelt warning
- Red seatbelt symbol, chime.
Check buckle connections (under seat). If passenger seatbelt light stays on with no passenger, seat mat sensor may be faulty.
🧵 Sensor mat $200-400, buckle switch $100-200.
Door / tailgate ajar
- Icon showing open door, interior light stays on.
Check microswitches in door latches (especially tailgate). Spray contact cleaner. Faulty switch often requires latch replacement.
🚪 Latch assembly $120-250 per door.
Engine immobiliser / steering lock
- Green or red key symbol, engine won’t crank.
Try second key – if works, first key chip damaged. If not, check ring antenna around ignition.
On keyless models, steering lock motor failure (common) – requires replacement or bypass.
🔐 Key programming $150-350, antenna ring $100-200, steering lock $500-900.
Stop & Start warning
- “S&S” or “ECO” off, light on dash.
System deactivates if battery low, engine temp not optimal, or bonnet switch faulty. Scan for S&S specific codes.
Check battery state of charge (AGM battery required). Auxiliary battery (if equipped) may be dead.
🪫 Aux battery $150-300, bonnet switch $60-120.
Bulb failure / lighting
- Yellow bulb symbol, message.
Visually check exterior lights (headlight, taillight, brake, turn). Replace failed bulb.
If bulb ok, check socket corrosion, earth connections. Can be BSI (body computer) issue on older models.
💡 Bulb $5-30, socket repair $50-120.
Service / spanner light
- Spanner symbol, “service” message, often with miles countdown.
Scheduled maintenance reminder (oil change). Can be reset via dashboard menu: hold button on dash while turning ignition.
If spanner stays after service, reset with diagnostic tool.
🔧 Oil service $100-200, reset free if DIY.
🔍 General diagnosis & tools
Most warning lights require a diagnostic scanner. For Peugeot/Citroen, a multi-system scanner (like DiagBox / Lexia) is best, but generic OBD2 readers can read engine codes. The OBD2 port is located under the dashboard, driver’s side. Always note the exact symbols and colour: red = stop immediately, amber = visit workshop soon. For any persistent light, a professional scan will save time.
Pro tip: resetting service light on Expert Tepee
Turn ignition off, then press and hold the “check” button (end of wiper stalk). Turn ignition on (do not start). Wait 10 seconds – spanner should flash and go out. Release button. If not, use diagnostic tool.
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