⚡ Opel Antara dashboard warning lights
ENCYCLOPEDIA 2026
2006–2017 all engines • symptoms • diagnosis • real repair costs
| icon | warning light | color | common issue (Antara) | avg cost range |
|---|---|---|---|---|
| check engine (MIL) | amber | EGR, thermostat, O2 sensor | $120–$800 | |
| oil pressure | red | switch, pump, balance shaft | $90–$950 | |
| battery / alternator | red | alternator regulator, belt | $150–$650 | |
| ABS | amber | rear wheel speed sensor | $140–$400 | |
| ESP / TC | amber | steering angle / yaw sensor | $200–$700 | |
| DPF (diesel) | amber | soot load, pressure sensor | $250–$2100 | |
| glow plug | amber | plug / relay failure | $80–$340 | |
| coolant temp | red | thermostat, water pump | $150–$650 | |
| airbag (SRS) | amber | clock spring, seat sensor | $180–$500 | |
| TPMS | amber | sensor battery, fault | $60–$150 per sensor | |
| brake pad wear | amber | wear sensor wire | $50–$200 | |
| water in fuel | amber | diesel filter drain | $20 (drain) – $180 | |
| immobiliser | red | transponder / antenna ring | $120–$450 | |
| auto light rain sensor | green | faulty sensor (rare) | $200–$380 | |
| reduced power | amber | throttle body, pedal sensor | $180–$600 |
Check engine light (MIL)
amber / flashing
🔧 issues & symptoms
- P0401 / P0402 – EGR stuck (loss of power, rough idle)
- P0128 – thermostat stuck open (slow warm-up, high fuel)
- P0300 – misfire (judder, flashing light = cat damage)
- P0087 – low fuel pressure (limp mode)
🔍 diagnosis (multiple methods)
- OBD2 scan: read freeze frame, mode $06 data
- visual: vacuum leaks, loose fuel cap, wiring to MAF
- live data: LTFT >10% = vac leak; O2 sensor cycling
- smoke test for intake leaks (common on 2.2 direct)
- exhaust backpressure test (DPF clog)
diagnosis $70–$160 | EGR clean $200–$400 | thermostat $180–$350 | O2 sensor $150–$380
Oil pressure warning
red
⚠️ root causes
- low oil level / wrong viscosity
- oil pump worn (balance shaft issues Z22SE)
- pressure switch failure (very common on 1.9 CDTI)
- clogged oil pickup screen
🔍 step-by-step diagnosis
- check level & condition immediately
- mechanical pressure gauge (spec >0.7 bar idle)
- unplug switch – if light goes out, switch faulty
- listen for chain rattle (tensioner failure)
- oil analysis for metal particles (bearing wear)
switch $60–$120 | pump & balance shaft $700–$1500 | oil change $80–$150
ABS / ESP lights
amber
⚠️ symptoms & issues
- rear wheel speed sensor (C0035, C0040) – Antara #1
- steering angle sensor uncalibrated after battery change
- yaw rate sensor failure (ESP light)
- corroded reluctor ring (rear axle)
🔍 diagnosis + options
- ABS scan (Bosch 8.0/9.0) – read exact code
- measure resistance speed sensor (800–1400 Ω)
- recalibrate steering angle with Tech2 / Autel
- check wiring at rear subframe (chafing)
rear sensor $120–$250 | module repair $350–$650 | calibration $80–$150
DPF / particulate filter
amber/red
⚠️ symptoms (2.0 CDTI)
- DPF light + reduced power
- frequent regeneration (every 100–200 km)
- oil level rising (fuel dilution)
- high soot load > 40g
🔍 diagnosis steps
- OBD: soot mass, differential pressure sensor
- exhaust temp before/after DPF during regen
- check additive (if fluid model) level
- forced regeneration with scanner
forced regen $120–$200 | pressure sensor $140–$260 | DPF replacement $1400–$2400
Airbag (SRS) warning
red/amber
⚠️ common Antara faults
- clock spring failure (horn & cruise also stop)
- passenger occupancy sensor mat (under seat)
- yellow connector under seat loose/corroded
🔍 diagnosis
- SRS scan (B1000, B1025, B1340)
- check steering wheel buttons – if not working, clock spring
- multimeter on squib (with caution)
- clear codes after seat connector fix
clock spring $200–$380 | occupancy mat $400–$800 | module reset $100–$200
Glow plug light flashing
amber flash
⚠️ issues
- one or more glow plugs open circuit
- glow relay stuck / failed
- control module fault (integrated in fusebox)
🔍 diagnosis
- resistance each plug (<1 Ω good, >5 Ω replace)
- test voltage at plug during preheat
- check relay & fuse (50A maxi)
set of 4 plugs $80–$200 | relay $70–$130 | module $180–$300
Battery charge light
red
⚠️ symptoms
- dim lights, slow crank, stall
- alternator noise (bearing/regulator)
- battery light on with high RPM = regulator
🔍 diagnosis
- voltage engine off: 12.4-12.6V, running: 13.8-14.8V
- ripple test (AC ripple >0.1V = diode failure)
- check belt tension, visible damage
alternator recon $280–$450 | new $450–$700 | battery $140–$300
Coolant temperature light
red / blue
⚠️ overheating / cold
- red: overheating (low coolant, fan fail, pump)
- blue: cold engine (thermostat stuck open)
🔍 diagnosis
- check coolant level & leaks
- verify electric fan operation (temp switch)
- feel radiator hoses (thermostat opening)
thermostat $150–$280 | water pump $350–$600 | fan resistor $90–$180
TPMS warning
amber
⚠️ causes
- low tyre pressure (seasonal)
- sensor battery dead (5-7 years)
- after tyre rotation, not relearned
🔍 diagnosis
- manual pressure check
- TPMS trigger tool to read sensor IDs
- inspect for broken valve stems
sensor replacement $70–$160 each | relearn $40–$80
Brake pad wear light
amber⚠️ front pad wear sensor wire broken (pad thickness <3mm) or sensor shorted.
🔍 inspect pad thickness, check sensor wire continuity (often broken on left front).
pad set + sensor $120–$250 per axle
Water in fuel filter
amber⚠️ water accumulated in diesel filter (sensor at bottom). Can cause injector damage.
🔍 drain water via drain screw; if light stays, replace filter & sensor.
drain (free) | filter kit $40–$90 | sensor $70–$140
Immobiliser warning
red key⚠️ key not recognised (transponder), antenna ring faulty, or ECU locked.
🔍 try spare key; check antenna ring connection; read immo codes with Tech2.
antenna ring $90–$180 | key programming $150–$350
Reduced power mode
amber⚠️ throttle body failure, accelerator pedal sensor, or turbo actuator (diesel).
🔍 scan for P0220, P2135; check throttle plate carbon; test pedal sensor voltages.
throttle body $300–$550 | pedal sensor $180–$320
Opel Antara advanced diagnostic tree
Multiple lights? Start with battery voltage (below 12V causes ABS/ESP chaos). Intermittent MIL: look at soldering in ECU (1.9 CDTI). If ESP + ABS + TPMS all come on together, suspect rear ABS sensor short or CAN bus error. We recommend genuine Opel Tech2 or equivalent for proper diagnosis. For any unclear warning, our partners at 24car-repair.com offer remote code reading and on‑site repair.
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