⚠️ OPEL MOKKA DASHBOARD WARNING LIGHTS
Every symbol, every symptom, deep‑scan diagnosis, and real workshop costs – no guesswork.
| Colour | Meaning | Immediate action | Mokka specific |
|---|---|---|---|
| 🔴 RED | Serious / safety critical | Stop engine now | Oil, brake, coolant, EPS |
| 🟡 AMBER/YELLOW | Warning – service soon | Inspect within 50 miles | Engine, ABS, TPMS, DPF |
| 🔵 BLUE | Information | No immediate risk | High beam, cold start |
| 🟢 GREEN | System active | None | Fog light, turn signal |
| ⚪ WHITE | Assist systems | Info only | Lane assist, cruise |
Full‑depth diagnosis & cost matrix
⚙️ Check Engine
🔧 Issue: Oxygen sensor, MAF, ignition coil, EVAP, VVT solenoid (Mokka 1.4T/1.6 CDTI).
📋 Symptoms: Rough idle, loss of power, increased fuel trims, flashing = misfire (cat damage risk).
- OBD2 scan – generic & manufacturer specific (P1xxx).
- Freeze frame data – capture conditions.
- Smoke test for vacuum/intake leaks.
- Fuel pressure test (Mokka direct injection: 50-200 bar).
- Compression test – especially 1.6T.
- Oscilloscope – crank/cam correlation.
🛢️ Oil pressure
Issue: Low oil, pump worn, pressure relief stuck, pick-up pipe clogged (1.3/1.6 CDTI).
Symptoms: Red oil can, rattling at 2000rpm, hot idle pressure <0.5 bar.
Diagnosis (advanced):- Manual mechanical gauge – replace switch if false.
- Inspect oil pickup seal (Mokka diesel common).
- Valve cover breather (overpressure).
- Acoustic analysis with stethoscope.
🔋 Charge system
Issue: Alternator (valve regulator), broken wire, IBS sensor (stop‑start).
Symptoms: Red battery icon, stop-start inactive, dash flicker.
Diagnosis: Voltage drop test (B+ to alternator), ripple measurement, IBS scan with Tech2, load test.🛑 Brake system
Faults: Low fluid, worn pads (wear sensor), handbrake switch, ABS hydraulic unit.
Diagnosis: Level sensor resistance, pad thickness, ABS module codes (C0035, C0040).
🔄 ABS/ESP
Issue: Wheel speed sensor (front right common), tone ring cracked, steering angle sensor.
Multi‑diagnosis: Signal voltage, resistance, oscilloscope pattern, check reluctor for rust.
TPMS
Issue: Dead sensor battery, faulty receiver, aftermarket wheels, no ID.
Diagnosis: TPMS trigger tool, check LF/HF receiver, relearn with op-com.
💥 Airbag SRS
Common Mokka: Passenger occupancy sensor (under seat mat), clock spring, seat belt tensioner.
Diagnosis: SRS scanner (B0012, B0020), connector corrosion, emulator bypass not safe.
⚡ EPS
Issue: Torque sensor, EPS motor overheat (Mokka B), low battery (under 11.8V).
Diagnosis: Live steering angle, recalibration, test supply at EPS module.
🌡️ Coolant
Failures: Thermostat stuck closed, fan resistor, water pump leak (1.4T).
Diagnosis: IR temp gun, resistance of ECT sensor, PWM fan test.
🔥 Glow system
Issue: 1-2 failed plugs, relay, controller (1.3 CDTI).
Diagnosis: Resistance 0.5‑1.0Ω, amperage draw, glow control module codes.
💨 DPF
Issue: Ash overload, pressure sensor hose, short trips – forced regen needed.
Diagnosis: Differential pressure, soot mass, oil dilution check.
💧 AdBlue
Mokka 1.6 CDTI (Euro6): Low level, quality, NOx sensor, pump.
Diagnosis: Fill level, reductant heater, OBD2 P20EE.
⛔ ESP off
Often due to steering angle sensor uncalibrated, yaw rate sensor, brake light switch.
Calibration with diagnostic tool – 5min job.
🛣️ Lane assist
Camera blocked, calibration needed, aftermarket windscreen.
🔄 Stop‑Start
Battery state of charge <75%, IBS error, clutch/brake sensor, gearbox neutral switch.
⛰️ Hill hold
Brake switch, ESP module communication.
💡 Bulb out
Check tail light, DRL, number plate light – Mokka canbus sensitive, use resistor.
⛽ Low fuel
Sender unit fault (stuck), range displayed.
| DTC | System | Component | Parts £ | Labour £ | Total |
|---|---|---|---|---|---|
| P0011 | VVT | Camshaft position actuator (1.4T) | 110 | 120 | 230 |
| P0101 | MAF | Mass airflow sensor | 95 | 40 | 135 |
| P0302 | Ignition | Coil pack cylinder 2 | 85 | 50 | 135 |
| P0420 | Emissions | Catalytic converter efficiency | 420 | 200 | 620 |
| P0521 | Oil pressure | Oil pressure sensor/switch | 40 | 50 | 90 |
| P0685 | Glow | Glow relay control | 65 | 40 | 105 |
| P2002 | DPF | Differential pressure sensor | 110 | 70 | 180 |
| P2096 | Fuel trim | Post catalyst O2 sensor | 95 | 60 | 155 |
| U0073 | CAN bus | Control module communication | — | 120 | 120* |
| C0035 | ABS | Left front wheel speed sensor | 70 | 60 | 130 |
| B0012 | Airbag | Driver pretensioner | 140 | 70 | 210 |
*CAN diagnosis – usually software update or connector repair.
Opel Mokka I vs Mokka II / Mokka-e
- Low battery cascade: In Mokka, 11.8V triggers ABS, ESP, EPS warnings – always test voltage first.
- IBS reset: After battery replacement, BMS reset via Tech2 or Op-Com mandatory.
- Immobiliser light: Flashing key – antenna ring, transponder chip, BCM communication.
- Water ingress: Boot/trunk – causes ABS/ESP random warnings (connector corrosion).
- Steering angle calibration: Required after any suspension work.
