P1238 on 2008-2010 Volvo V70 — Manufacturer-Specific Fuel/Injector System Fault
1 vehicles · 1 makes · $350-$900 repair
Most Reported On
P1238 is an OBD-II diagnostic trouble code meaning “Manufacturer-Specific Fuel/Injector System Fault.” P1238 is a manufacturer-specific powertrain code whose definition varies by maker, so it should be confirmed against model-specific data. Reported meanings include a fuel pump circuit/relay fault (Ford), a mechanical injector failure on some Toyota diesels, and a cylinder 2 injector circuit (open) fault on some Volkswagen/Audi applications. In general it points to a fuel-delivery or fuel-injector problem that can cause hard starting, stalling, misfire, and reduced power. This code is most commonly reported on 2008-2010 Volvo V70, with repair costs ranging from $350 to $900.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P1238, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P1238 mean?
P1238 stands for "Manufacturer-Specific Fuel/Injector System Fault." P1238 is a manufacturer-specific powertrain code whose definition varies by maker, so it should be confirmed against model-specific data. Reported meanings include a fuel pump circuit/relay fault (Ford), a mechanical injector failure on some Toyota diesels, and a cylinder 2 injector circuit (open) fault on some Volkswagen/Audi applications. In general it points to a fuel-delivery or fuel-injector problem that can cause hard starting, stalling, misfire, and reduced power.
What are the most common causes of P1238?
The most common causes of P1238 are: Fuel pump circuit, relay, or driver fault (Ford), Faulty or open fuel injector / injector circuit (cylinder-specific, VW), Wiring, connector, or ground problems in the fuel circuit, Mechanical injector failure (some Toyota diesels), Fuel pump or fuel delivery weakness, Faulty PCM/ECM driver, Corroded or loose electrical connections. The specific cause varies by vehicle.
How much does it cost to fix P1238?
Repair costs for P1238 range from $350 to $900, depending on the vehicle and root cause.
Which vehicles are affected by P1238?
Au7o has documented P1238 across 1 vehicle models from 1 manufacturers: Volvo.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.